He lingered some five minutes outside the great house in St. James' Square, watching the couples in the rooms above, and particularly interested in one face which appeared in, and disappeared from, a brilliantly lighted alcove twice while he was standing there. A certain grace of girlhood attended this apparition; the dress was rich and costly and exquisitely made; but that which held Alban's closer attention was the fact that the wearer of it unquestionably was a Pole, and not unlike little Lois Boriskoff herself. He would not say, indeed, that the resemblance was striking--it might have been merely that of nationality. When the girl appeared for the second time, he admitted that the comparison was rather wild. None the less, he liked to think that she resembled Lois and might also have heard the news from Warsaw to-day. Evidently she was the daughter of some rich foreigner in London, for she talked and moved with Continental animation and grace. The type of face had always made a sure appeal to Alban. He liked those broad contrasts of color; the clear, almost white, skin; the bright red lips; the open expressive eyes fringed by deep and eloquent lashes. This unknown was taller than little Lois certainly--she had a maturer figure and altogether a better carriage; but the characteristics of her nationality were as sure--and the boy fell to wondering whether she was also capable of that winsome sentiment and jealous frenzy which dictated many of the seemingly inconsequent acts of the little heroine of Thrawl Street. This he imagined to be quite possible. "They are great as a nation," he thought, "but most of them are mad. I will tell Lois to-morrow that I have seen her sister in St. James' Square. I shouldn't wonder if she knew all about this house and the party--and Boriskoff will, if she doesn't." He contented himself with this; and the girl having disappeared from the alcove and a footman announced, in a terrible voice, that Lady Smigg's carriage barred the way, he turned from the house and continued upon his way to the "caves." It was then nearly one o'clock, and save for an occasional hansom making a dash to a club door, St. James' Street was deserted. Alban took one swift look up and down, crossed the street at a run and disappeared down the court which led to those amazing "tombs" of which few in London save the night-birds and the builders so much as suspect the existence. He did not go alone; he was not, as he thought, unwatched. A detective, commissioned by an unknown patron to follow him, crossed the road directly he had disappeared, and saying, "So that's the game," began to wonder if he also might dare the venture. He, at least, knew well what he was doing and the class of person he would be likely to meet down there in the depths of which even the police were afraid. CHAPTER IV THE CAVES