Near the water, on each side, an entrance to the stockade had been made, and a movable piece of timber, with a notch in it and a brace behind, served to close each of these gates; and when thus closed and fastened from the inside, the gates were as secure as any other part of the fortress.
Jack's prediction that the enemy would not appear on Monday night was verified. The whole of that week, indeed, was passed in complete quietude.
Having made their fortress reasonably secure, the boys resumed work upon the boat on Monday and continued it throughout the week; but they gave only one half of each day to that task, devoting the other half to the work of strengthening their fort. The posts, as we know, were originally set six inches apart for the sake of hurrying the work, but this was not intended to be a permanent arrangement. As fast as they could the boys filled up the spaces thus left, and by Saturday night the fort was complete, so that its inmates felt entirely confident of their ability to beat off any attack the negro squatters might choose to make.
Meantime the boat approached completion, though there was, perhaps, a week's work, or a little less, still to be done upon her.
"We must caulk her seams," said Ned on Sunday, as the boys sat chatting round their fire, "with moss instead of oakum, and then we'll coat her all over with pitch."
"By the way," answered Charley, "we've got to make the pitch. Do you know how, Ned?"
"Not very well," replied Ned, "but I think we can make out."
"I know," said Jack; "I've seen tar made in the North Carolina tar country, and pitch is only boiled tar."
"Very well, then, you shall superintend that job," said Ned; "you know that was our bargain, to make each fellow manage the things he understood best."
"You'd better make a lot of salt, then, right away, beginning to-morrow morning."
"Why? You don't use salt in making pitch, do you?"
"No; but I shall want the big kettle to boil the tar in, and it won't be fit for use as a salt kettle after that."
"Then we must cook up all our rice too," said Charley.
"No, we needn't," said Ned; "it would spoil if we did, and we can cook it, as we need it, in the coffee-pot."
Early the next morning these preparations were begun. Charley got his salt factory at work, Ned worked at the boat, and Jack made preparations for tar-burning. He began by digging a pit about four feet square and two feet deep. Then – at a distance of about a foot – he dug another pit about three feet square and four feet deep. He packed the wall of earth that separated the two pits as firmly as he could, and then, cutting a long joint of cane for a tar pipe, he passed it through this wall, from a point exactly at the bottom of the shallow pit. He inclined it downward a little, so that the tar might easily run though it and fall into the deeper pit.
Having finished this part of his work, Jack went into the woods near the camp and prepared a large quantity of "fat" pine for burning. Piling this in the shallow pit, and heaping it two or three feet above the level ground, he took the shovel and covered the pile with earth to a depth of a foot or more, leaving a single opening through which he could set fire to the mass. His object was, by smothering the flames in this way, to make the fat, resinous pine burn slowly, creating a roasting heat under the earth, and thus, as it were, melting the tar out of the pine. If he had not covered the wood with earth, it would have blazed up and burned to smoke, resin and all, making no tar at all.
When all was ready the pile was set on fire, and as soon as it had caught well, Jack covered the single opening with earth, and the mound smoked like a volcano. Pretty soon a little stream of smoking-hot tar began trickling through the cane-tube into the deep pit.
Night had now come on, and the smoke from the tar-kiln, catching the light from the camp-fire, glowed with a peculiar red color, and gave a picturesque air of strangeness to the camp.
"You've started a young volcano, Jack," said Charley, as he looked at the smoking mound.
"Yes. An improvement on Crusoe," said Ned; "he had no volcano on his island. But what a quantity of smoke the thing does make. It looks as if more material came out of the mound in that way than you put into it in the shape of wood."
"Yes, and so a gallon of water will fill a big room if you make it into steam."
"What is smoke anyhow?" asked Charley.
"It is composed of several things," answered Ned, "but chiefly of carbon. Indeed, all that you can see in smoke is carbon."
"Then why doesn't it burn?"
"It would if it were kept in the fire long enough; but the light vapors that rise from the fire carry the particles of carbon with them, and so they get out of the fire before they are burned. The smoke is simply so much wasted fuel, and many plans have been made to save it in factories where the cost of fuel is great."
"There's a big waste in making tar, then," said Charley.
"Not half so much as you think," said Jack. "They don't waste the smoke up in the North Carolina tar country."
"How do they burn it?"
"They don't burn it, but they catch it and sell it."
"How do you mean?"
"Why, they have wire screens stretched over the tar-kilns, and as the smoke strikes them the fine particles of carbon stick to them. I have seen masses of them hanging down many inches from the screens, and very pretty they are too."
"But what do they do with the stuff?" asked Charley.
"Sell it. It is called lamp-black, and it brings a pretty good price."
"That is close economy, isn't it?"
"Yes, but it is frequently by just such 'margins' as that that manufacturing becomes profitable. It is a very poor and desolate-looking country up there in the tar-making districts, and I remember hearing a man say once, as we passed through it: 'This is the country where they waste nothing; they bark the trees to get resin: they distil the resin and make turpentine; what's left is rosin; when the trees die they burn them to make tar, catch the smoke for lamp-black, and there aren't any ashes.'"
CHAPTER XIX
A NIGHT OF ADVENTURE
The tar flowed freely during Monday night and Tuesday, and by the time that Tuesday's labors were finished, there was enough in the deep vat to make all the pitch that was required. The salt-making was finished too, and the big kettle was ready for use the next day in boiling the tar to make pitch of it.
On Tuesday evening Ned determined to go fishing, as he did nearly every night when the tide was at a proper stage. He had learned now the spots most frequented by the mullets, and usually succeeded in bringing back a good supply of them to camp. The boys had grown very tired indeed of their restricted diet. For three weeks now they had not tasted meat of any kind – for they never repeated their snake supper, – but had lived on fish, shrimps, oysters, and a few crabs; and being without bacon or any other kind of fat with which to fry their fish, they could not make an appearance of variety by changing the way of cooking them. They had to eat every thing boiled, or roasted, or broiled on the coals, and in the absence of butter and other seasoning for broiled fish, the roast, baked, broiled, and boiled all tasted alike. They had lost their relish for such food as they could get, but having nothing else they were forced to eat it.
On this Tuesday night Ned remained away from camp longer than usual, and at about eleven o'clock Charley went to bed, Jack mounting guard. About an hour later Jack waked Charley, saying:
"I'm uneasy about Ned, Charley. It must be midnight and he hasn't come in yet."
Charley sprang up quickly, and the two looked and listened. Finally it was decided that as Charley was less able to run than Jack – because of the dog-bite, which had not yet entirely healed, – he should remain on guard while Jack should go out in search of Ned.
Ten minutes later Jack came back, running as quietly as he could, and hastily pushed through the eastern gate. Fastening this, he exclaimed in an excited way:
"The squatters are all around us, and I'm afraid they've captured Ned."
"Why? Where are they? Tell me all about it, quick."
"I don't know much about it myself," answered Jack. "I only know that as I walked down along the shore in the direction that Ned took, I almost stumbled over one of the squatters. I retreated, of course, and by keeping in the bushes and looking and listening, I made out that there were at least half a dozen of them about. As I could see nothing, and hear nothing of Ned, I'm afraid they've caught him. You see they came right along the shore where he was wading about and fishing, and if they hadn't caught him, of course he would have run in to give us the alarm. Poor fellow! I wonder if they'll kill him?"
"I'm afraid of worse than that," said Charley, solemnly
"What?" asked Jack.
"I'm afraid they'll flog him. That would be horrible! for my part I'd a good deal rather be killed, and I'm sure Ned would."
"Yes, of course," said Jack. Then, after a pause, he added: