The young fellow lit a fresh cigarette and, leaning against the deep portico of the house opposite, possessed himself in patience. Time went on. A police constable passed and repassed, but did not notice him in the shadow, for he hid his cigarette. All the windows of the great building he was watching were in darkness. It was evident now that Boyne would not come out again before morning.
Yet Durrant, with great pertinacity, waited there through the whole night until, at half-past six, the hall-porter threw open the outer door, and milkmen, the postman, and newspaper boys began to arrive in quick succession. Without bite or sup Gerald waited there till half-past ten, when, full of chagrin at being thus foiled, he was compelled to hurry to his office, getting a wash and a shave on the way.
At lunch he met Marigold as usual, and told her of his failure, whereupon she said:
"I have the afternoon off. I'll go at once and see my aunt, and ascertain when he got back."
This she did, and when that evening Durrant arrived home at Ealing he found a wire awaiting him which told him that when Boyne's housekeeper took him up his early tea as usual, her master had been in bed!
Durrant held his breath. The mystery-man had some means of exit from Upper Brook Street – a back way, without a doubt.
But what was the motive of it all? Why should he pose as penurious in Hammersmith, and wear evening clothes in Mayfair?
That night Durrant went again to Upper Brook Street, and, exploring the rear of the building, found that there was a servants' entrance to the flats which led into a mews, and through a back street. By that Bernard Boyne had, no doubt, walked out while Durrant had been keeping his night vigil.
This fact further impressed both Marigold and her lover that Boyne was not what he represented himself to be.
Durrant set out to probe the mystery, and by dint of ingenious application to the affair, he became on friendly terms with the hall-porter. Truth to tell, Durrant had represented himself to be a demobilised officer who had been in love with a lady who had rented one of the flats. He had discovered her name from the house-agent, and knew that she had married during the war.
From the hall-porter he learned that the man who had passed in was an occasional visitor, but to whom he did not know. He would try and ascertain. The lips of all hall-porters of flats are readily unlocked when their hands are "crossed with silver." And why not? In our post-war civilisation little is effected without a quid pro quo. Even the British Cabinet Minister looks for reward; alas! that it should be so. Patriotism in all the Allied Countries seems synonymous with personal ruin, and those who have realised the fact are the profiteers upon gallant men's lives.
Gerald's discovery at the back of Upper Brook Street brought the pair to a dead end as far as their investigations went.
They met as usual at lunch and discussed the situation. What could be done?
"All I can see, Marigold, is for you to continue your visits constantly to Bridge Place and learn all you can from your aunt," Durrant said. "There is evidently something extraordinary in progress. But what it is we cannot possibly tell without more thorough investigation."
"But what can we do further?" asked the girl.
"I can do nothing just yet, except to receive reports from you," replied Gerald. "You can visit Boyne's house and let me know from time to time what is in progress there."
"But the prisoner upstairs?" she asked. "How can I know more?"
"By watching," was his reply. "Do you know, Marigold, I've been thinking – thinking deeply over the affair. We are both agreed that we intend to fathom the secret of this man. Well, now could you not one evening, when you visit your aunt, be taken suddenly very unwell, and then remain there in the house and watch?"
"Really, Gerald, that's a splendid idea!" exclaimed the girl. "Yet it seems an imposition upon Mr. Boyne."
"I know that. He poses as a man without anything whatever save the commission he collects upon the premiums on the lives of the honest inhabitants of Hammersmith. Yet, as we know, he is in touch with certain people of a much higher class than himself. The house in Pont Street is a great enigma to me. We must elucidate the mystery. That is my object."
"I am ready to work at your orders, Gerald," was the girl's reply, with the genuine love-look in her eyes. "Yes, we will do our utmost to solve this mystery!"
In consequence of this conversation, a few days later Marigold went one afternoon to visit her aunt, old Mrs. Felmore, and in the evening was taken very unwell.
Mr. Boyne, who returned as usual about six o'clock, was told of the girl's illness and went down to the kitchen, where he saw her, and, speaking kindly, asked if he should fetch the doctor.
"No, thank you, Mr. Boyne," the girl answered, rather weakly. "It's awfully good of you, but no doubt I shall be better presently, and able to go home. I have a curious dizziness. It came on quite suddenly."
"Are you subject to it?" he inquired. And then in the next breath asked if he could get her anything.
"My aunt has given me a cup of tea," was her reply. "And I already feel better."
"Don't think of going to Wimbledon to-night unless you feel better," he urged. "Mrs. Felmore can make you up a bed in the spare room."
She thanked him, and though she assured him she would be well enough to go home in an hour or so, she had no intention of returning home that night.
Boyne, on his part, looked weary and worn. His clothes were shabby, and his cheap boots were down at heel and dusty after a long day's tramp in the meaner streets of Hammersmith.
Returning to his sitting-room, he took his bulky insurance books from his pocket. Then he threw off his jacket, sat down to tea in his shirt sleeves, and fed "Nibby," his pet rat.
Mrs. Felmore, like many deaf folk, could tell what was said by watching people's lips. When her employer had left the kitchen, she remarked to her niece:
"Isn't Mr. Boyne a dear nice man? Whenever I feel unwell he is always so ready to get me anything. You know how bad I was with my rheumatism last winter? He wouldn't let me work, but engaged old Mrs. Kirk from the Mall."
"Yes, auntie, he is," Marigold declared. "But I didn't tell him how bad I feel. I really don't know what has come over me."
"Why not let him call the doctor?"
"Oh, no. I'll be all right soon," she said cheerfully; and then she reseated herself in the summer twilight near the open window.
At half-past eight o'clock Bernard Boyne, having washed and changed his clothes, went out.
Marigold fell to wondering where he might be going. It had been arranged that Gerald should be on watch outside the house that night, but when they had met at lunch, he had told her that he was compelled to accompany his principal to Birmingham that afternoon, for a conference was to be held in that city on the following day.
"I may be away for a day or two, dear," he had said. "But in the meanwhile discover all you can."
Boyne went direct from Hammersmith to Pont Street, where he found that his wife had gone out to dinner. She would be back soon after ten, the young man-servant informed him.
Therefore he went to his room and put on evening clothes – a very smartly-cut suit with white waist-coat and mother-of-pearl and diamond buttons. As he stood before the long cheval glass, examining himself after he had tied his cravat and put on his coat, the transformation, he thought, was surely complete. Nobody meeting him in that luxuriously furnished house would ever have recognised in him the trudging, hard-working insurance agent of Hammersmith.
He descended to the drawing-room, but his wife did not return till past ten. She was in a strikingly handsome gown of black-and-gold tissue, with a shimmering ornament in her hair, while around her neck was a rope of splendid pearls.
"Well, Lilla!" he exclaimed pleasantly, as he threw himself lazily into a soft arm-chair. "I'm glad you're back early. Where are we to meet Ena?"
"At Murray's, at eleven. Then we go on to the Carlton to supper," was her reply. "Remember our name to-night is Davidson, and we live at Welsford Hall, in Northamptonshire. Ena wants to introduce us to Mrs. Morrison."
"But Mrs. Morrison is likely to meet one of us again, and it might be awkward," the man remarked, as he slowly lit a cigarette.
"She is not likely to meet us again – except at Ena's house – is she?" said his wife, with a curious expression in her narrow eyes.
"No, I suppose not – if all goes right, and there is no hitch," he said reflectively.
"Hitch! How can there be a hitch?" asked Lilla. "Ena will do her part, while you do yours."
"When does Ena propose that the little affair shall be done?" he asked.
"Next Saturday – if that suits you?"
"Saturday," he repeated again reflectively, as he examined his cigarette. "It will take about nine to ten days, so on the following Monday or Tuesday week it should be complete."