History of the Intellectual Development of Europe, Volume II (of 2)

In their resistance to the German attack the popes never hesitated at any means. They prompted Prince Henry to revolt against their great antagonist, his father; they intervened, not to rebuke, but to abet him, when he threw his father into prison and deprived him of the necessaries of life. They carried their vengeance beyond the grave. When the aged emperor, broken in heart, escaped from their torment, and was honourably buried by the Bishop of Liège, that prelate was forthwith excommunicated and compelled to disinter the corpse. But crimes like these, against which human nature revolts, meet with retribution. Resistance of Henry V. This same Prince Henry, becoming Henry V., was forced by circumstances to resume his father's quarrel, and to refuse to yield his right of granting investitures. He marched upon Rome, and at the point of the sword compelled his adversary, Pope Paschal II., to surrender all the possessions and royalties of the Church – compelled him to crown him emperor – not, however, until the pontiff had been subjected to the ignominy of imprisonment, and brought into condemnation among his own party.

Bernard of Clairvaux stimulates the second crusade. Things seemed to be going to ruin in Rome, and such must inevitably have been the issue, had not an extraneous influence arisen in Bernard of Clairvaux, to whom Europe learned to look up as the beater down of heresies, theological and political. He had been a pupil of William of Champeaux, the vanquished rival of Abelard, and Abelard he hated with a religious and personal hate. He was a wonder-worker. He excommunicated the flies which infested a church – they all fell down dead and were swept out by the basketful. He has been described as "the mellifluous doctor, whose works are not scientific, but full of unction." He could not tolerate the principle at the basis of Abelard's philosophy – the assertion of the supremacy of reason. Of Arnold of Brescia – who carried that principle to its political consequences, and declared that the riches and power of the clergy were inconsistent with their profession – he was the accuser and punisher. Its failure. Bernard preached a new crusade, authenticating his power by miracles, affirmed to be not inferior to those of our Saviour; promising to him who should slay an unbeliever happiness in this life and Paradise in the life to come. This second crusade was conducted by kings, and included fanatic ladies, dressed in the armour of men; but it ended in ruin.

It was reserved for the only Englishman who ever attained to the papacy to visit Rome with the punishment she had so often inflicted upon others. Nicolas Breakspear – Adrian IV. – put the Eternal City under interdict, thereby ending the republic which the partisans of Arnold of Brescia had set up. But in this he was greatly aided by a change of sentiment in many of the inhabitants of Rome, who had found to their cost that it was more profitable for their city to be the centre of Christianity than the seat of a phantom republic. Murder of Arnold of Brescia. As an equivalent for his coronation by Adrian, Frederick Barbarossa agreed to surrender to the Church Arnold of Brescia. With indecent haste, the moment she had obtained possession of her arch-enemy she put him to death – not delivering him over to the secular arm, as the custom had been, but murdering him with her own hand. Seven centuries have elapsed, and the blood of Arnold is still crying from the ground for retribution. Notwithstanding a new – the third – crusade, things went from bad to worse in the Holy Land. Saladin had retaken Jerusalem, A.D. 1187. Barbarossa was drowned in a river in Pisidia. Richard of England was treacherously imprisoned; nor did the pope interfere for this brave soldier of the Cross. Birth of Frederick II. In the meantime, the Emperors of Germany had acquired Sicily by marriage – an incident destined to be of no little importance in the history of Europe; for, on the death of the Emperor Henry VI. at Messina, his son Frederick, an infant not two years old, was left to be brought up in that island. What the consequences were we shall soon see.

Review of the preceding events. If we review the events related in this chapter, we find that the idolatry and immorality into which Rome had fallen had become connected with material interests sufficiently powerful to ensure their perpetuation; that converted Germany insisted on a reform, and therefore made a moral attack on the Italian system, attempting to carry it into effect by civil force. This attack was, properly speaking, purely moral, the intellectual element accompanying it being derived from Western or Arabian influences, as will be shown in the next chapter; and, in its resistance to this, the papacy was not only successful, but actually was able to retaliate, overthrowing the Emperors of Germany, and being even on the point of establishing a European autocracy, with the pope at its head. It was in these events that the Reformation began, though circumstances intervened to postpone its completion to the era of Luther. Henceforth we see more and more plainly the attitude in which the papacy, through its material interests, was compelled to stand, as resisting all intellectual advancement. Our subject has therefore here to be left unfinished until we shall have described the Mohammedan influences making pressures on the West and the East.

CHAPTER II

THE AGE OF FAITH IN THE WEST – (Continued)

THE WESTERN OR INTELLECTUAL ATTACK ON THE ITALIAN SYSTEM

The intellectual Condition of Christendom contrasted with that of Arabian Spain.

Diffusion of Arabian intellectual Influences through France and Sicily. – Example of Saracen Science in Alhazen, and of Philosophy in Algazzali. – Innocent III. prepares to combat these Influences. – Results to Western Europe of the Sack of Constantinople by the Catholics.

The spread of Mohammedan light Literature is followed by Heresy. – The crushing of Heresy in the South of France by armed Force. – The Inquisition, mendicant Orders, auricular Confession, and Casuistry.

The rising Sentiment is embodied in Frederick II. in Sicily. – His Conflict with and Overthrow by the Pope. – Spread of Mutiny among the mendicant Orders.

The pressure from the West upon Rome. A pressure upon the Italian system had meantime been arising in the West. It was due to the presence of the Arabs in Spain. It is necessary, therefore, to relate the circumstances of their invasion and conquest of that country, and to compare their social and intellectual condition with the contemporary state of Christendom.

Barbarism of Europe. From the barbarism of the native people of Europe, who could scarcely be said to have emerged from the savage state, unclean in person, benighted in mind, inhabiting huts in which it was a mark of wealth if there were bulrushes on the floor and straw mats against the wall; miserably fed on beans, vetches, roots, and even the bark of trees; clad in garments of untanned skin, or at the best of leather – perennial in durability, but not conducive to personal purity – a state in which the pomp of royalty was sufficiently and satisfactorily manifested in the equipage of the sovereign, an ox-cart, drawn by not less than two yokes of cattle, quickened in their movements by the goads of pedestrian serfs, whose legs were wrapped in wisps of straw; from a people, devout believers in all the wild fictions of shrine-miracles and preposterous relics; from the degradation of a base theology, and from the disputes of ambitious ecclesiastics for power, it is pleasant to turn to the south-west corner of the continent, where, under auspices of a very different kind, the irradiations of light were to break forth. The crescent in the West was soon to pass eastward to its full.

But I must retrace my steps through four centuries, and resume the description of the Arabian movement after the subjugation of Africa, as related in the former volume, Chapter XI.

Arab invasion of Spain. Those were the circumstances of the Arab conquest of Spain. In that country the Arian Creed had been supplanted by the orthodox, and the customary persecutions had set in. From the time of the Emperor Hadrian, who had transported 50,000 Jewish families into Spain, that race had greatly increased, and, as might be expected, had received no mercy at the hands of the orthodox. Ninety thousand individuals had recently suffered compulsory baptism, and so had been brought under the atrocious Catholic law that whoever has been baptized shall be compelled to continue the observances of the Church. The Gothic monarchy was elective, and Roderic had succeeded to the throne, to the prejudice of the heirs of his predecessor. Though a very brave soldier, he was a luxurious and licentious man. It was the custom of the Goths to send their children to Toledo to be educated, and, under these circumstances, a young girl of extraordinary beauty, the daughter of Count Julian, governor of Ceuta in Africa, was residing there. King Roderic fell passionately in love with her, and, being unable to overcome her virtuous resolution by persuasion, resorted to violence. The girl found means to inform her father of what had occurred. "By the living God!" exclaimed the count, in a paroxysm of rage, "I will be revenged." But, dissembling his wrath, he crossed over into Spain, had an understanding with Oppas, the Archbishop of Toledo, and other disaffected ecclesiastics, and, under specious pretences, lulled the suspicions of Roderic, and brought his daughter away. And now he opened communications with the Emir Musa, prevailing upon him to attempt the conquest of the country, and offering that he himself would take the lead. The conditions were settled between them, and the consent of the khalif to the expedition obtained. Its conquest. Tarik, a lieutenant of the emir, was sent across the Straits with the van of the army. He landed on the rock called, in memory of his name, Gibraltar, April, A.D. 711. In the battle that ensued, a part of Roderic's troops, together with the Archbishop of Toledo, consummated their treasonable compact, and deserted to the Arabs; the rest were panic-stricken. In the rout, Roderic himself was drowned in the waters of the Guadalquivir.

Tarik now proceeded rapidly northward, and was soon joined by his superior, the Emir Musa, who was not, perhaps, without jealousy at his success. As the Arab historians say, the Almighty delivered the idolators into their hand, and gave them one victory after another. As the towns successively fell, they left them in charge of the Jews, to whose revenge the conquest was largely due, and who could be thoroughly trusted; nor did they pause in their march until they had passed the French frontier and reached the Rhone. It was the intention of Musa to cross the European continent to Constantinople, subjugating the Frank, German, and Italian barbarians by the way. At this time it seemed impossible that France could escape the fate of Spain; and if she fell, the threat of Musa would inevitably have come to pass, that he would preach the Unity of God in the Vatican. But a quarrel had arisen between him and Tarik, who had been imprisoned and even scourged. The friends of the latter, however, did not fail him at the court of Damascus. An envoy from the Khalif Alwalid appeared, ordering Musa to desist from his enterprise, to return to Syria, and exonerate himself of the things laid to his charge. But Musa bribed the envoy to let him advance. Hereupon the angry khalif dispatched a second messenger, who, in face of the Moslems and Christians, audaciously arrested him, at the head of his troops, by the bridle of his horse. The conqueror of Spain was compelled to return. He was cast into prison, fined 200,000 pieces of gold, publicly whipped, and his life with difficulty spared. As is related of Belisarius, Musa was driven as a beggar to solicit charity, and the Saracen conqueror of Spain ended his days in grief and absolute want.

Arrest of Mohammedanism in Western Europe. The dissensions among the Arabs, far more than the sword of Charles Martel, prevented the Mohammedanization of France. Their historians admit the great check received at the battle of Tours, in which Abderrahman was killed; they call that field the Place of the Martyrs; but their accounts by no means correspond to the relations of the Christian authors, who affirm that 375,000 Mohammedans fell, and only 150 °Christians. The defeat was not so disastrous but that in a few months they were able to resume their advance, and their progress was arrested only by renewed dissensions among themselves – dissensions not alone among the leaders in Spain, but also more serious ones of aspirants for the khalifate in Asia. On the overthrow of the Ommiade house, Abderrahman, one of that family, escaped to Spain, which repaid the patronage of its conquest by acknowledging him as its sovereign. He made Cordova the seat of his government. Neither he nor his immediate successors took any other title than that of Emir, out of respect to the khalif, who resided at Bagdad, the metropolis of Islam, though they maintained a rivalry with him in the patronage of letters and science. Abderrahman himself strengthened his power by an alliance with Charlemagne.

Civilization and splendour of the Spanish Arabs. Scarcely had the Arabs become firmly settled in Spain when they commenced a brilliant career. Adopting what had now become the established policy of the Commanders of the Faithful in Asia, the Emirs of Cordova distinguished themselves as patrons of learning, and set an example of refinement strongly contrasting with the condition of the native European princes. Cordova, under their administration, at its highest point of prosperity, boasted of more than two hundred thousand houses, and more than a million of inhabitants. After sunset, a man might walk through it in a straight line for ten miles by the light of the public lamps. Seven hundred years after this time there was not so much as one public lamp in London. Its streets were solidly paved. In Paris, centuries subsequently, whoever stepped over his threshold on a rainy day stepped up to his ankles in mud. Other cities, as Granada, Seville, Toledo, considered themselves rivals of Cordova. The palaces of the khalifs were magnificently decorated. Those sovereigns might well look down with supercilious contempt on the dwellings of the rulers of Germany, France, and England, which were scarcely better than stables – chimneyless, windowless, and with a hole in the roof for the smoke to escape, like the wigwams of certain Indians. The Spanish Mohammedans had brought with them all the luxuries and prodigalities of Asia. Their palaces and gardens. Their residences stood forth against the clear blue sky, or were embosomed in woods. They had polished marble balconies, overhanging orange-gardens; courts with cascades of water; shady retreats provocative of slumber in the heat of the day; retiring-rooms vaulted with stained glass, speckled with gold, over which streams of water were made to gush; the floors and walls were of exquisite mosaic. Here, a fountain of quicksilver shot up in a glistening spray, the glittering particles falling with a tranquil sound like fairy bells; there, apartments into which cool air was drawn from the flower-gardens, in summer, by means of ventilating towers, and in winter through earthen pipes, or caleducts, imbedded in the walls – the hypocaust, in the vaults below, breathing forth volumes of warm and perfumed air through these hidden passages. The walls were not covered with wainscot, but adorned with arabesques, and paintings of agricultural scenes and views of Paradise. From the ceilings, corniced with fretted gold, great chandeliers hung, one of which, it is said, was so large that it contained 1804 lamps. Clusters of frail marble columns surprised the beholder with the vast weights they bore. In the boudoirs of the sultanas they were sometimes of verd antique, and incrusted with lapis lazuli. The furniture was of sandal and citron wood, inlaid with mother-of-pearl, ivory, silver, or relieved with gold and precious malachite. In orderly confusion were arranged vases of rock crystal, Chinese porcelains, and tables of exquisite mosaic. The winter apartments were hung with rich tapestry; the floors were covered with embroidered Persian carpets. Pillows and couches, of elegant forms, were scattered about the rooms, perfumed with frankincense. It was the intention of the Saracen architect, by excluding the view of the external landscape, to concentrate attention on his work; and since the representation of the human form was religiously forbidden, and that source of decoration denied, his imagination ran riot with the complicated arabesques he introduced, and sought every opportunity of replacing the prohibited works of art by the trophies and rarities of the garden. For this reason, the Arabs never produced artists; religion turned them from the beautiful, and made them soldiers, philosophers, and men of affairs. Splendid flowers and rare exotics ornamented the courtyards and even the inner chambers. Great care was taken to make due provision for the cleanliness, occupation, and amusement of the inmates. Through pipes of metal, water, both warm and cold, to suit the season of the year, ran into baths of marble; in niches, where the current of air could be artificially directed, hung dripping alcarazzas. Libraries and works of taste. There were whispering-galleries for the amusement of the women; labyrinths and marble play-courts for the children; for the master himself, grand libraries. The Khalif Alhakem's was so large that the catalogue alone filled forty volumes. He had also apartments for the transcribing, binding, and ornamenting of books. A taste for caligraphy and the possession of splendidly-illuminated manuscripts seems to have anticipated in the khalifs, both of Asia and Spain, the taste for statuary and paintings among the later popes of Rome.

The court of Abderrahman III. Such were the palace and gardens of Zehra, in which Abderrahman III. honoured his favourite sultana. The edifice had 1200 columns of Greek, Italian, Spanish, and African marble. Its hall of audience was incrusted with gold and pearls. Through the long corridors of its seraglio black eunuchs silently glided. The ladies of the harem, both wives and concubines, were the most beautiful that could be found. To that establishment alone 6300 persons were attached, The body-guard of the sovereign was composed of 12,000 horsemen, whose cimeters and belts were studded with gold. This was that Abderrahman who, after a glorious reign of fifty years, sat down to count the number of days of unalloyed happiness he had experienced, and could only enumerate fourteen. "Oh man!" exclaimed the plaintive khalif, "put not thy trust in this present world."

Social habits of the Moors. No nation has ever excelled the Spanish Arabs in the beauty and costliness of their pleasure-gardens. To them we owe the introduction of very many of our most valuable cultivated fruits, such as the peach. Retaining the love of their ancestors for the cooling effect of water in a hot climate, they spared no pains in the superfluity of fountains, hydraulic works, and artificial lakes in which fish were raised for the table. Into such a lake, attached to the palace of Cordova, many loaves were cast each day to feed the fish. There were also menageries of foreign animals; aviaries of rare birds; manufactories in which skilled workmen, obtained from foreign countries, displayed their art in textures of silk, cotton, linen, and all the miracles of the loom; in jewelry and filigree-work, with which they ministered to the female pride of the sultanas and concubines. Under the shade of cypresses cascades disappeared; among flowering shrubs there were winding walks, bowers of roses, seats cut out of the rock, and crypt-like grottoes hewn in the living stone. Nowhere was ornamental gardening better understood; for not only did the artist try to please the eye as it wandered over the pleasant gradation of vegetable colour and form – he also boasted his success in the gratification of the sense of smell by the studied succession of perfumes from beds of flowers.

Their domestic life. To these Saracens we are indebted for many of our personal comforts. Religiously cleanly, it was not possible for them to clothe themselves according to the fashion of the natives of Europe, in a garment unchanged till it dropped to pieces of itself, a loathsome mass of vermin, stench, and rags. No Arab who had been a minister of state, or the associate or antagonist of a sovereign, would have offered such a spectacle as the corpse of Thomas à Becket when his haircloth shirt was removed. They taught us the use of the often-changed and often-washed under-garment of linen or cotton, which still passes among ladies under its old Arabic name. But to cleanliness they were not unwilling to add ornament. Especially among women of the higher classes was the love of finery a passion. Their outer garments were often of silk, embroidered and decorated with gems and woven gold. So fond were the Moorish women of gay colours and the lustre of chrysolites, hyacinths, emeralds, and sapphires, that it was quaintly said that the interior of any public building in which they were permitted to appear looked like a flower-meadow in the spring besprinkled with rain.

They cultivate literature, music, In the midst of all this luxury, which cannot be regarded by the historian with disdain, since in the end it produced a most important result in the south of France, the Spanish khalifs, emulating the example of their Asiatic compeers, and in this strongly contrasting with the popes of Rome, were not only the patrons, but the personal cultivators of all the branches of human learning. One of them was himself the author of a work on polite literature in not less than fifty volumes; another wrote a treatise on algebra. When Zaryab the musician came from the East to Spain, the Khalif Abderrahman rode forth to meet him in honour. The College of Music in Cordova was sustained by ample government patronage, and produced many illustrious professors.

but disapprove of European mythology. The Arabs never translated into their own tongue the great Greek poets, though they so sedulously collected and translated the Greek philosophers. Their religious sentiments and sedate character caused them to abominate the lewdness of our classical mythology, and to denounce indignantly any connexion between the licentious, impure Olympian Jove and the Most High God as an insufferable and unpardonable blasphemy. Haroun al Raschid had gratified his curiosity by causing Homer to be translated into Syriac, but he did not adventure on rendering the great epics into Arabic. Notwithstanding this aversion to our graceful but not unobjectionable ancient poetry, among them originated the Tensons, or poetic disputations, carried afterward to perfection among the Troubadours; from them, also, the Provençals learned to employ jongleurs. Across the Pyrenees, literary, philosophical, and military adventurers were perpetually passing; and thus the luxury, the taste, and above all, the chivalrous gallantry and elegant courtesies of Moorish society found their way from Granada and Cordova to Provence and Languedoc. The south of France contracts their tastes. The French, and German, and English nobles imbibed the Arab admiration of the horse; they learned to pride themselves on skilful riding. Hunting and falconry became their fashionable pastimes; they tried to emulate that Arab skill which had produced the celebrated breed of Andalusian horses. It was a scene of grandeur and gallantry; the pastimes were tilts and tournaments. The refined society of Cordova prided itself in its politeness. A gay contagion spread from the beautiful Moorish miscreants to their sisters beyond the mountains; the south of France was full of the witcheries of female fascinations, and of dancing to the lute and mandolin. Light literature spreads into Sicily and Italy. Even in Italy and Sicily the love-song became the favourite composition; and out of these genial but not orthodox beginnings the polite literature of modern Europe arose. The pleasant epidemic spread by degrees along every hillside and valley. In monasteries, voices that had vowed celibacy might be heard carolling stanzas of which St. Jerome would hardly have approved; there was many a juicy abbot, who could troll forth in jocund strains, like those of the merry sinners of Malaga and Xeres, the charms of women and wine, though one was forbidden to the Moslem and one to the monk. The sedate greybeards of Cordova had already applied to the supreme judge to have the songs of the Spanish Jew, Abraham Ibn Sahal, prohibited; for there was not a youth, nor woman, nor child in the city who could not repeat them by heart. Their immoral tendency was a public scandal. The light gaiety of Spain was reflected in the coarser habits of the northern countries. It was an archdeacon of Oxford who some time afterward sang,

"Mihi sit propositum in tabernâ mori,
Vinum sit appositum morientis ori,
Ut dicant, cum venerint angelorum chori;
'Deus sit propitius huic potatori,'" etc.

Even as early as the tenth century, persons having a taste for learning and for elegant amenities found their way into Spain from all adjoining countries; a practice in subsequent years still more indulged in, when it became illustrated by the brilliant success of Gerbert, who, as we have seen, passed from the Infidel University of Cordova to the papacy of Rome.

The Arabian school system. The khalifs of the West carried out the precepts of Ali, the fourth successor of Mohammed, in the patronage of literature. They established libraries in all their chief towns; it is said that not fewer than seventy were in existence. To every mosque was attached a public school, in which the children of the poor were taught to read and write, and instructed in the precepts of the Koran. For those in easier circumstances there were academies, usually arranged in twenty-five or thirty apartments, each calculated for accommodating four students; the academy being presided over by a rector. In Cordova, Granada, and other great cities, there were universities frequently under the superintendence of Jews; the Mohammedan maxim being that the real learning of a man is of more public importance than any particular religious opinions he may entertain. In this they followed the example of the Asiatic khalif, Haroun al Raschid, who actually conferred the superintendence of his schools on John Masué, a Nestorian Christian. The Mohammedan liberality was in striking contrast with the intolerance of Europe. Indeed, it may be doubted whether at this time any European nation is sufficiently advanced to follow such an example. In the universities some of the professors of polite literature gave lectures on Arabic classical works; others taught rhetoric or composition, or mathematics, or astronomy. From these institutions many of the practices observed in our colleges were derived. They held Commencements, at which poems were read and orations delivered in presence of the public. They had also, in addition to these schools of general learning, professional ones, particularly for medicine.

Cultivation of grammar, rhetoric, composition. With a pride perhaps not altogether inexcusable, the Arabians boasted of their language as being the most perfect spoken by man. Mohammed himself, when challenged to produce a miracle in proof of the authenticity of his mission, uniformly pointed to the composition of the Koran, its unapproachable excellence vindicating its inspiration. The orthodox Moslems – the Moslems are those who are submissively resigned to the Divine will – are wont to assert that every page of that book is indeed a conspicuous miracle. It is not then surprising that, in the Arabian schools, great attention was paid to the study of language, and that so many celebrated grammarians were produced. By these scholars, dictionaries, similar to those now in use, were composed; their copiousness is indicated by the circumstance that one of them consisted of sixty volumes, the definition of each word being illustrated or sustained by quotations from Arab authors of acknowledged repute. They had also lexicons of Greek, Latin, Hebrew; and cyclopedias such as the Historical Dictionary of Sciences of Mohammed Ibn Abdallah, of Granada. In their highest civilization and luxury they did not forget the amusements of their forefathers – listening to the tale-teller, who never failed to obtain an audience in the midst of Arab tents. Around the evening fires in Spain the wandering literati exercised their wonderful powers of Oriental invention, edifying the eager listeners by such narrations as those that have descended to us in the Arabian Nights' Entertainments. The more sober and higher efforts of the educated were, of course, directed to pulpit eloquence, in conformity with the example of all the great Oriental khalifs, and sanctified by the practice of the Prophet himself. Defects of their literature. Their poetical productions embraced all the modern minor forms – satires, odes, elegies, etc.; but they never produced any work in the higher walks of poesy, no epic, no tragedy. Perhaps this was due to their false fashion of valuing the mechanical execution of a work. They were the authors and introducers of rhyme; and such was the luxuriance and abundance of their language, that, in some of their longest poems, the same rhyme is said to have been used alternately from the beginning to the end. Where such mechanical triumphs were popularly prized, it may be supposed that the conception and spirit would be indifferent. Even among the Spanish women there were not a few who, like Velada, Ayesha, Labana, Algasania, achieved reputation in these compositions; and some of them were daughters of khalifs. And this is the more interesting to us, since it was from the Provençal poetry, the direct descendant of these efforts, that European literature arose. Sonnets and romances at last displaced the grimly-orthodox productions of the wearisome and ignorant fathers of the Church.

If fiction was prized among the Spanish Arabs, history was held in not less esteem. Every khalif had his own historian. The instincts of the race are perpetually peeping out; not only were there historians of the Commanders of the Faithful, but also of celebrated horses and illustrious camels. In connexion with history, statistics were cultivated; this having been, it may be said, a necessary study, from the first enforced on the Saracen officers in their assessment of tribute on conquered misbelievers, and subsequently continued as an object of taste. Their taste for practical science. It was, doubtless, a similar necessity, arising from their position, that stamped such a remarkably practical aspect on the science of the Arabs generally. Many of their learned men were travellers and voyagers, constantly moving about for the acquisition or diffusion of knowledge, their acquirements being a passport to them wherever they went, and a sufficient introduction to any of the African or Asiatic courts. They were thus continually brought in contact with men of affairs, soldiers of fortune, statesmen, and became imbued with much of their practical spirit; and hence the singularly romantic character which the biographies of many of these men display, wonderful turns of prosperity, violent deaths. The scope of their literary labours offers a subject well worthy of meditation; it contrasts with the contemporary ignorance of Europe. Some wrote on chronology; some on numismatics; some, now that military eloquence had become objectless, wrote on pulpit oratory; some on agriculture and its allied branches, as the art of irrigation. Not one of the purely mathematical, or mixed, or practical sciences was omitted. Their continued inclination to the study of medicine. Out of a list too long for detailed quotation, I may recall a few names. Assamh, who wrote on topography and statistics, a brave soldier, who was killed in the invasion of France, A.D. 720; Avicenna, the great physician and philosopher, who died A.D. 1037; Averroes, of Cordova, the chief commentator on Aristotle, A.D. 1198. It was his intention to unite the doctrines of Aristotle with those of the Koran. To him is imputed the discovery of spots upon the sun. The leading idea of his philosophy was the numerical unity of the souls of mankind, though parted among millions of living individuals. He died at Morocco. Abu Othman wrote on zoology; Alberuni, on gems – he had travelled to India to procure information; Rhazes, Al Abbas, and Al Beithar, on botany – the latter had been in all parts of the world for the purpose of obtaining specimens. Ebn Zoar, better known as Avenzoar, may be looked upon as the authority in Moorish pharmacy. Pharmacopœias were published by the schools, improvements on the old ones of the Nestorians: to them may be traced the introduction of many Arabic words, such as syrup, julep, elixir, still used among apothecaries. Relics of the Arab vocabulary. A competent scholar might furnish not only an interesting, but valuable book, founded on the remaining relics of the Arab vocabulary; for, in whatever direction we may look, we meet, in the various pursuits of peace and war, of letters and of science, Saracenic vestiges. Our dictionaries tell us that such is the origin of admiral, alchemy, alcohol, algebra, chemise, cotton, and hundreds of other words. The Saracens commenced the application of chemistry, both to the theory and practice of medicine, in the explanation of the functions of the human body and in the cure of its diseases. Their medicine and surgery. Nor was their surgery behind their medicine. Albucasis, of Cordova, shrinks not from the performance of the most formidable operations in his own and in the obstetrical art; the actual cautery and the knife are used without hesitation. He has left us ample descriptions of the surgical instruments then employed; and from him we learn that, in operations on females in which considerations of delicacy intervened, the services of properly instructed women were secured. How different was all this from the state of things in Europe; the Christian peasant, fever-stricken or overtaken by accident, hied to the nearest saint-shrine and expected a miracle; the Spanish Moor relied on the prescription or lancet of his physician, or the bandage and knife of his surgeon.

Liberality of the Asiatic khalifs. In mathematics the Arabians acknowledged their indebtedness to two sources, Greek and Indian, but they greatly improved upon both. The Asiatic khalifs had made exertions to procure translations of Euclid, Apollonius, Archimedes, and other Greek geometers. Almaimon, in a letter to the Emperor Theophilus, expressed his desire to visit Constantinople if his public duties would have permitted. He requests of him to allow Leo the mathematician to come to Bagdad to impart to him a portion of his learning, pledging his word that he would restore him quickly and safely again. "Do not," says the high-minded khalif, "let diversity of religion or of country cause you to refuse my request. Do what friendship would concede to a friend. In return, I offer you a hundred weight of gold, a perpetual alliance and peace." True to the instincts of his race and the traditions of his city, the Byzantine sourly and insolently refused the request, saying that "the learning which had illustrated the Roman name should never be imparted to a barbarian."

Their great improvements in arithmetic. From the Hindus the Arabs learned arithmetic, especially that valuable invention termed by us the Arabic numerals, but honourably ascribed by them to its proper source, under the designation of "Indian numerals." They also entitled their treatises on the subject "Systems of Indian Arithmetic." This admirable notation by nine digits and cipher occasioned a complete revolution in arithmetical computations. As in the case of so many other things, the Arab impress is upon it; our word cipher, and its derivatives, ciphering, etc., recall the Arabic word tsaphara or ciphra, the name for the 0, and meaning that which is blank or void. Mohammed Ben Musa, said to be the earliest of the Saracen authors on algebra, and who made the great improvement of substituting sines for chords in trigonometry, wrote also on this Indian system. He lived at the end of the ninth century; before the end of the tenth it was in common use among the African and Spanish mathematicians. Ebn Junis, A.D. 1008, used it in his astronomical works. From Spain it passed into Italy, its singular advantage in commercial computation causing it to be eagerly adopted in the great trading cities. We still use the word algorithm in reference to calculations. The study of algebra was intently cultivated among the Arabs, who gave it the name it bears. Ben Musa, just referred to, was the inventor of the common method of solving quadratic equations. Their astronomical discoveries. In the application of mathematics to astronomy and physics they had been long distinguished. Almaimon had determined with considerable accuracy the obliquity of the ecliptic. His result, with those of some other Saracen astronomers, is as follows:

Almaimon had also ascertained the size of the earth from the measurement of a degree on the shore of the Red Sea – an operation implying true ideas of its form, and in singular contrast with the doctrine of Constantinople and Rome. While the latter was asserting, in all its absurdity, the flatness of the earth, the Spanish Moors were teaching geography in their common schools from globes. In Africa, there was still preserved, with almost religious reverence, in the library at Cairo, one of brass, reputed to have belonged to the great astronomer Ptolemy. Al Idrisi made one of silver for Roger II., of Sicily; and Gerbert used one which he had brought from Cordova in the school he established at Rheims. It cost a struggle of several centuries, illustrated by some martyrdoms, before the dictum of Lactantius and Augustine could be overthrown. Among problems of interest that were solved may be mentioned the determination of the length of the year by Albategnius and Thebit Ben Corrah; and increased accuracy was given to the correction of astronomical observations by Alhazen's great discovery of atmospheric refraction. Among the astronomers, some composed tables; some wrote on the measure of time; some on the improvement of clocks, for which purpose they were the first to apply the pendulum; some on instruments, as the astrolabe. The introduction of astronomy into Christian Europe has been attributed to the translation of the works of Mohammed Fargani. In Europe, also, the Arabs were the first to build observatories; the Giralda, or tower of Seville, was erected under the superintendence of Geber, the mathematician, A.D. 1196, for that purpose. Its fate was not a little characteristic. After the expulsion of the Moors it was turned into a belfry, the Spaniards not knowing what else to do with it.

Europe tries to hide its obligations to them. I have to deplore the systematic manner in which the literature of Europe has contrived to put out of sight our scientific obligations to the Mohammedans. Surely they cannot be much longer hidden. Injustice founded on religious rancour and national conceit cannot be perpetuated for ever. What should the modern astronomer say when, remembering the contemporary barbarism of Europe, he finds the Arab Abul Hassan speaking of tubes, to the extremities of which ocular and object diopters, perhaps sights, were attached, as used at Meragha? what when he reads of the attempts of Abderrahman Sufi at improving the photometry of the stars? Are the astronomical tables of Ebn Junis (A.D. 1008), called the Hakemite tables, or the Ilkanic tables of Nasser Eddin Tasi, constructed at the great observatory just mentioned, Meragha, near Tauris, A.D. 1259, or the measurement of time by pendulum oscillations, and the methods of correcting astronomical tables by systematic observations – are such things worthless indications of the mental state? The Arab has left his intellectual impress on Europe, as, before long, Christendom will have to confess; he has indelibly written it on the heavens, as any one may see who reads the names of the stars on a common celestial globe.

Improvements in the arts of life. Our obligations to the Spanish Moors in the arts of life are even more marked than in the higher branches of science, perhaps only because our ancestors were better prepared to take advantage of things connected with daily affairs. They set an example of skilful agriculture, the practice of which was regulated by a code of laws. Not only did they attend to the cultivation of plants, introducing very many new ones, they likewise paid great attention to the breeding of cattle, especially the sheep and horse. To them we owe the introduction of the great products, rice, sugar, cotton, and also, as we have previously observed, nearly all the fine garden and orchard fruits, together with many less important plants, as spinach and saffron. To them Spain owes the culture of silk; they gave to Xeres and Malaga their celebrity for wine. They introduced the Egyptian system of irrigation by flood-gates, wheels, and pumps. They also promoted many important branches of industry; improved the manufacture of textile fabrics, earthenware, iron, steel; the Toledo sword-blades were everywhere prized for their temper. The Arabs, on their expulsion from Spain, carried the manufacture of a kind of leather, in which they were acknowledged to excel, to Morocco, from which country the leather itself has now taken its name. They also introduced inventions of a more ominous kind – gunpowder and artillery. The cannon they used appeared to have been made of wrought iron. But perhaps they more than compensated for these evil contrivances by the introduction of the mariner's compass.

Their commerce. The mention of the mariner's compass might lead us correctly to infer that the Spanish Arabs were interested in commercial pursuits, a conclusion to which we should also come when we consider the revenues of some of their khalifs. That of Abderrahman III. is stated at five and a half million sterling – a vast sum if considered by its modern equivalent, and far more than could possibly be raised by taxes on the produce of the soil. It probably exceeded the entire revenue of all the sovereigns of Christendom taken together. From Barcelona and other ports an immense trade with the Levant was maintained, but it was mainly in the hands of the Jews, who, from the first invasion of Spain by Musa, had ever been the firm allies and collaborators of the Arabs. Together they had participated in the dangers of the invasion; together they had shared its boundless success; together they had held in irreverent derision, nay, even in contempt, the woman-worshippers and polytheistic savages beyond the Pyrenees – as they mirthfully called those whose long-delayed vengeance they were in the end to feel; together they were expelled. Against such Jews as lingered behind the hideous persecutions of the Inquisition were directed. But in the days of their prosperity they maintained a merchant marine of more than a thousand ships. They had factories and consuls on the Tanaïs. With Constantinople alone they maintained a great trade; it ramified from the Black Sea and East Mediterranean into the interior of Asia; it reached the ports of India and China, and extended along the African coast as far as Madagascar. Even in these commercial affairs the singular genius of the Jew and Arabs shines forth. In the midst of the tenth century, when Europe was about in the same condition that Caffraria is now, enlightened Moors, like Abul Cassem, were writing treatises on the principles of trade and commerce. As on so many other occasions, on these affairs they have left their traces. The smallest weight they used in trade was the grain of barley, four of which were equal to one sweet pea, called in Arabic carat. We still use the grain as our unit of weight, and still speak of gold as being so many carats fine.

Obligations to the Khalifs of the West. Such were the Khalifs of the West; such their splendour, their luxury, their knowledge; such some of the obligations we are under to them – obligations which Christian Europe, with singular insincerity, has ever been fain to hide. The cry against the misbeliever has long outlived the Crusades. Considering the enchanting country over which they ruled, it was not without reason that they caused to be engraven on the public seal, "The servant of the Merciful rests contented in the decrees of God." What more, indeed, could Paradise give them? But, considering also the evil end of all this happiness and pomp, this learning, liberality, and wealth, we may well appreciate the solemn truth which these monarchs, in their day of pride and power, grandly wrote in the beautiful mosaics on their palace walls, an ever-recurring warning to him who owes dominion to the sword, "There is no conqueror but God."

Examination of Mohammedan science. The value of a philosophical or political system may be determined by its fruits. On this principle I examined in Vol. I., Chapter XII., the Italian system, estimating its religious merit from the biographies of the popes, which afford the proper criterion. In like manner, the intellectual state of the Mohammedan nations at successive epochs may be ascertained from what is its proper criterion, the contemporaneous scientific manifestation.

At the time when the Moorish influences in Spain began to exert a pressure on the Italian system, there were several scientific writers, fragments of whose works have descended to us. As an architect may judge of the skill of the ancient Egyptians in his art from a study of the Pyramids, so from these relics of Saracenic learning we may demonstrate the intellectual state of the Mohammedan people, though much of their work has been lost and more has been purposely destroyed.

Review of the works of Alhazen. Among such writers is Alhazen; his date was about A.D. 1100. It appears that he resided both in Spain and Egypt, but the details of his biography are very confused. Through his optical works, which have been translated into Latin, he is best known to Europe. He corrects the theory of vision. He was the first to correct the Greek misconception as to the nature of vision, showing that the rays of light come from external objects to the eye, and do not issue forth from the eye, and impinge on external things, as, up to his time, had been supposed. His explanation does not depend upon mere hypothesis or supposition, but is plainly based upon anatomical investigation as well as on geometrical discussion. Determines the function of the retina. He determines that the retina is the seat of vision, and that impressions made by light upon it are conveyed along the optic nerve to the brain. Though it might not be convenient, at the time when Alhazen lived, to make such an acknowledgment, no one could come to these conclusions, nor, indeed, know anything about these facts, unless he had been engaged in the forbidden practice of dissection. Explains single vision. With felicity he explains that we see single when we use both eyes, because of the formation of the visual images on symmetrical portions of the two retinas. To the modern physiologist the mere mention of such things is as significant as the occurrence of an arch in the interior of the pyramid is to the architect. But Alhazen shows that our sense of sight is by no means a trustworthy guide, and that there are illusions arising from the course which the rays of light may take when they suffer refraction or reflexion. It is in the discussion of one of these physical problems that his scientific greatness truly shines forth. Traces the course of a ray of light through the air. He is perfectly aware that the atmosphere decreases in density with increase of height; and from that consideration he shows that a ray of light, entering it obliquely, follows a curvilinear path which is concave toward the earth; and that, since the mind refers the position of an object to the direction in which the ray of light from it enters the eye, the result must be an illusion as respects the starry bodies; they appear to us, to use the Arabic term, nearer to the zenith than they actually are, and not in their true place. Astronomical refraction. We see them in the direction of the tangent to the curve of refraction as it reaches the eye. Hence also he shows that we actually see the stars, and the sun, and the moon before they have risen and after they have set – a wonderful illusion. He shows that in its passage through the air the curvature of a ray increases with the increasing density, and that its path does not depend on vapours that chance to be present, but on the variation of density in the medium. The horizontal sun and moon. To this refraction he truly refers the shortening, in their vertical diameter, of the horizontal sun and moon; to its variations he imputes the twinkling of the fixed stars. The apparent increase of size of the former bodies when they are in the horizon he refers to a mental deception, arising from the presence of intervening terrestrial objects. Explains the twilight. He shows that the effect of refraction is to shorten the duration of night and darkness by prolonging the visibility of the sun, and considering the reflecting action of the air, he deduces that beautiful explanation of the nature of twilight – the light that we perceive before the rising and after the setting of the sun – which we accept at the present time as true. Determines the height of the atmosphere. With extraordinary acuteness, he applies the principles with which he is dealing to the determination of the height of the atmosphere, deciding that its limit is nearly 58 ½ miles.

All this is very grand. Shall we compare it with the contemporaneous monk miracles and monkish philosophy of Europe? It would make a profound impression if communicated for the first time to a scientific society in our own age. Nor perhaps does his merit end here. If the Book of the Balance of Wisdom, for a translation of which we are indebted to M. Khanikoff, the Russian consul-general at Tabriz, be the production of Alhazen, of which there seems to be internal proof, it offers us evidence of a singular clearness in mechanical conception for which we should scarcely have been prepared, and, if it be not his, at all events it indisputably shows the scientific acquirements of his age. The weight of the air. In that book is plainly set forth the connexion between the weight of the atmosphere and its increasing density. The weight of the atmosphere was therefore understood before Torricelli. This author shows that a body will weigh differently in a rare and in a dense atmosphere; that its loss of weight will be greater in proportion as the air is more dense. Principles of hydrostatics. He considers the force with which plunged bodies will rise through heavier media in which they are immersed, and discusses the submergence of floating bodies, as ships upon the sea. He understands the doctrine of the centre of gravity. Theory of the balance. He applies it to the investigation of balances and steelyards, showing the relations between the centre of gravity and the centre of suspension – when those instruments will set and when they will vibrate. He recognizes gravity as a force; asserts that it diminishes with the distance; but falls into the mistake that the diminution is as the distance, and not as its square. Gravity; capillary attraction; the hydrometer. He considers gravity as terrestrial, and fails to perceive that it is universal – that was reserved for Newton. He knows correctly the relation between the velocities, spaces, and times of falling bodies, and has very distinct ideas of capillary attraction. He improves the construction of that old Alexandrian invention, the hydrometer – the instrument which, in a letter to his fair but pagan friend Hypatia, the good Bishop of Ptolemais, Synesius, six hundred years previously, requests her to have made for him in Alexandria, as he wishes to try the wines he is using, his health being a little delicate. Tables of specific gravities. The determinations of the densities of bodies, as given by Alhazen, approach very closely to our own; in the case of mercury they are even more exact than some of those of the last century. I join, as, doubtless, all natural philosophers will do, in the pious prayer of Alhazen, that, in the day of judgment, the All-Merciful will take pity on the soul of Abur-Raihân, because he was the first of the race of men to construct a table of specific gravities; and I will ask the same for Alhazen himself, since he was the first to trace the curvilinear path of a ray of light through the air. Though more than seven centuries part him from our times, the physiologists of this age may accept him as their compeer, since he received and defended the doctrine now forcing its way, of the progressive development of animal forms. The theory of development of organisms. He upheld the affirmation of those who said that man, in his progress, passes through a definite succession of states; not, however, "that he was once a bull, and was then changed to an ass, and afterwards into a horse, and after that into an ape, and finally became a man." This, he says, is only a misrepresentation by "common people" of what is really meant. The "common people" who withstood Alhazen have representatives among us, themselves the only example in the Fauna of the world of that non-development which they so loudly affirm. At the best they are only passing through some of the earlier forms of that series of transmutations to which the devout Mohammedan in the above quotation alludes.

The Arabians, with all this physical knowledge, do not appear to have been in possession of the thermometer, though they knew the great importance of temperature measures, employing the areometer for that purpose. They had detected the variation in density of liquids by heat, but not the variation in volume. In their measures of time they were more successful; they had several kinds of clepsydras. A balance clepsydra is described in the work from which I am quoting. The pendulum clock. But it was their great astronomer, Ebn Junis, who accomplished the most valuable of all chronometric improvements. He first applied the pendulum to the measure of time. Laplace, in the fifth note to his Systeme du Monde, avails himself of the observations of this philosopher, with those of Albategnius and other Arabians, as incontestable proof of the diminution of the eccentricity of the earth's orbit. Astronomical works of Ebn Junis. He states, moreover, that the observation of Ebn Junis of the obliquity of the ecliptic, properly corrected for parallax and refraction, gives for the year A.D. 1000 a result closely approaching to the theoretical. He also mentions another observation of Ebn Junis, October 31, A.D. 1007, as of much importance in reference to the great inequalities of Jupiter and Saturn. The Arabic numerals. I have already remarked that, in the writings of this great Arabian, the Arabic numerals and our common arithmetical processes are currently used. From Africa and Spain they passed into Italy, finding ready acceptance among commercial men, who recognised at once their value, and, as William of Malmesbury says, being a wonderful relief to the "sweating calculators;" an epithet of which the correctness will soon appear to any one who will try to do a common multiplication or division problem by the aid of the old Roman numerals. It is said that Gerbert – Pope Sylvester – was the first to introduce a knowledge of them into Europe; he had learned them at the Mohammedan university of Cordova. It is in allusion to the cipher, which follows the 9, but which, added to any of the other digits, increases by tenfold its power, that, in a letter to his patron, the Emperor Otho III., with humility he playfully but truly says, "I am like the last of all the numbers."

Arabian philosophy. The overthrow of the Roman by the Arabic numerals foreshadowed the result of a far more important – a political – contest between those rival names. But, before showing how the Arabian intellect pressed upon Rome, and the convulsive struggles of desperation which Rome made to resist it, I must for a moment consider the former under another point of view, and speak of Saracen philosophy. The writings of Algazzali. And here Algazzali shall be my guide. He was born A.D. 1058.

Let us hear him speak for himself. He is relating his attempt to detach himself from the opinions which he had imbibed in his childhood: "I said to myself, 'My aim is simply to know the truth of things; consequently, it is indispensable for me to ascertain what is knowledge.' Now it was evident to me that certain knowledge must be that which explains the object to be known in such a manner that no doubt can remain, so that in future all error and conjecture respecting it must be impossible. The certitude of knowledge. Not only would the understanding then need no efforts to be convinced of certitude, but security against error is in such close connexion with knowledge, that, even were an apparent proof of falsehood to be brought forward, it would cause no doubt, because no suspicion of error would be possible. Thus, when I have acknowledged ten to be more than three, if any one were to say, 'On the contrary, three is more than ten, and to prove the truth of my assertion, I will change this rod into a serpent,' and if he were to change it, my conviction of his error would remain unshaken. His manœuvre would only produce in me admiration for his ability. I should not doubt my own knowledge.

"Then was I convinced that knowledge which I did not possess in this manner, and respecting which I had not this certainty, could inspire me with neither confidence nor assurance; and no knowledge without assurance deserves the name of knowledge.

"Having examined the state of my own knowledge, I found it divested of all that could be said to have these qualities, unless perceptions of the senses and irrefragable principles were to be considered such. Fallibility of the senses. I then said to myself, 'Now, having fallen into this despair, the only hope of acquiring incontestable convictions is by the perceptions of the senses and by necessary truths.' Their evidence seemed to me to be indubitable. I began, however, to examine the objects of sensation and speculation, to see if they possibly could admit of doubt. Then doubts crowded upon me in such numbers that my incertitude became complete. Whence results the confidence I have in sensible things? The strongest of all our senses is sight; and yet, looking at a shadow, and perceiving it to be fixed and immovable, we judge it to be deprived of movement; nevertheless, experience teaches us that, when we return to the same place an hour after, the shadow is displaced, for it does not vanish suddenly, but gradually, little by little, so as never to be at rest. If we look at the stars, they seem to be as small as money-pieces; but mathematical proofs convince us that they are larger than the earth. These and other things are judged by the senses, but rejected by reason as false. I abandoned the senses, therefore, having seen all my confidence in their truth shaken.

"'Perhaps,' said I, 'there is no assurance but in the notions of reason, that is to say, first principles, as that ten is more than three; the same thing cannot have been created and yet have existed from all eternity; to exist and not to exist at the same time is impossible.'

Fallibility of reason. "Upon this the senses replied, 'What assurance have you that your confidence in reason is not of the same nature as your confidence in us? When you relied on us, reason stepped in and gave us the lie; had not reason been there, you would have continued to rely on us. Well, may there not exist some other judge superior to reason, who, if he appeared, would refute the judgments of reason in the same way that reason refuted us? The non-appearance of such a judge is no proof of his non-existence.'

The nature of dreams. "I strove in vain to answer the objection, and my difficulties increased when I came to reflect on sleep. I said to myself, 'During sleep, you give to visions a reality and consistence, and you have no suspicion of their untruth. On awakening, you are made aware that they were nothing but visions. What assurance have you that all you feel and know when you are awake does actually exist? It is all true as respects your condition at that moment; but it is nevertheless possible that another condition should present itself which should be to your awakened state that which to your awakened state is now to you sleep; so that, as respects this higher condition, your waking is but sleep.'"

It would not be possible to find in any European work a clearer statement of the scepticism to which philosophy leads than what is thus given by this Arabian. Indeed, it is not possible to put the argument in a more effective way. His perspicuity is in singular contrast with the obscurity of many metaphysical writers.