Here, Lauriston knew he was in a difficulty. He had kept these two rings safely hidden in his old-fashioned trunk ever since coming to London, and had never shown them to a single person—he had, indeed, never seen them himself for a long time until he took them out that afternoon. But where was his proof of that! He had no relations to whom he could appeal. His mother had possessed an annuity; just sufficient to maintain her and her son, and to give Lauriston a good education: it had died with her, and all that she had left him, to start life on, was about two hundred pounds and some small personal belongings, of which the rings and his father's watch and chain were a part. And he remembered now that his mother had kept those rings as securely put away as he had kept them since her death—until they came into his hands at her death he had only once seen them; she had shown them to him when he was a boy and had said they were very valuable. Was it possible that there was any one, far away in Scotland, who had known his mother and who would come forward—if need arose—and prove that those rings had been her property? But when he had put this question to himself, he had to answer it with a direct negative—he knew of no one.

There was one gleam of hope in this critical situation. John Purdie was coming to London. Lauriston had always felt that he could rely on John Purdie, and he had just received proof of the value of his faith in his old schoolmate. John Purdie would tell him what to do: he might even suggest the names of some of Mrs. Lauriston's old friends. And perhaps the need might not arise—there must surely be some clue to the old pawnbroker's assailant; surely the police would go deeper into the matter. He cheered up at these thoughts, and having written replies to the two welcome letters and asked John Purdie to see him immediately on his arrival in town, he went out again to the post-office and to fulfil his promise to Melky to call at the pawnshop.

Lauriston was naturally of quick observation. He noticed now, as he stepped out into the ill-lighted, gloomy street that a man was pacing up and down in front of the house. This man took no notice of him as he passed, but before he had reached Praed Street, he glanced around, and saw that he was following him. He followed him to Spring Street post-office; he was in his rear when Lauriston reached the pawnshop. Idly and perfunctorily as the man seemed to be strolling about, Lauriston was sure that he was shadowing him—and he told Melky of the fact when Melky admitted him to the shop by the private door.

"Likely enough, mister," remarked Melky. "But I shouldn't bother myself about it if I were you. There'll be more known about this affair before long. Now, look here," he continued, leading the way into the little back-parlour where Lauriston had found Daniel Multenius lying dead, "here's you and me alone—Zillah, she's upstairs, and Mrs. Goldmark is with her. Just you tell me what you saw when you came in here, d'you see, Mr. Lauriston—never mind the police—just give me the facts. I ain't no fool, you know, and I'm going to work this thing out."

Lauriston gave Melky a complete account of his connection with the matter: Melky checked off all the points on his long fingers. At the end he turned to the table and indicated the finely-bound book which Lauriston had noticed when he and the detective had first looked round.

"The police," said Melky, "made Zillah lock up that tray o' rings that was there in a drawer what she had to clear out for 'em, and they've put a seal on it till tomorrow. They've got those rings of yours, too, mister, haven't they?"

"They said it would be best for me to leave them with them," answered Lauriston. "Ayscough advised it. They gave me a receipt for them, you know."

"All right," remarked Melky. "But there's something they ain't had the sense to see the importance of—that fine book there. Mister!—that there book wasn't in this parlour, nor in this shop, nor in this house, at a quarter to five o'clock this afternoon, when my cousin Zillah went out, leaving the poor old man alone. She'll swear to that. Now then, who brought it here—who left it here? Between the time Zillah went out, mister, and the time you come in, and found what you did find, somebody—somebody!—had been in here and left that book behind him! And—mark you!—it wasn't pawned, neither. That's a fact! And—it's no common book, that. Look at it, Mr. Lauriston—you'd ought to know something about books. Look at it!—s'elp me if I don't feel there's a clue in that there volume, whoever it belongs to!"

Lauriston took the book in his hands. He had only glanced at it casually before; now he examined it carefully, while Melky stood at his elbow, watching. The mysterious volume was certainly worthy of close inspection—a small quarto, wonderfully bound in old dark crimson morocco leather, and ornamented on sides and back with curious gold arabesque work: a heavy clasp, also intricately wrought, held the boards together. Lauriston, something of a book lover, whose natural inclination was to spend his last shilling on a book rather than on beef and bread, looked admiringly at this fine specimen of the binder's art as he turned it over.

"That's solid gold, isn't it?" he asked as he unfastened the clasp.
"You know."