That there was mystery in this affair was surer than ever when, having got the man to the nearest inn, and brought more help, including a doctor, they began to examine him and his clothing. And now that I saw him in a stronger light, I found that he was a strongly built, well-made man of about Mr. Gilverthwaite's age—say, just over sixty years or so,—dressed in a gentlemanlike fashion, and wearing good boots and linen and a tweed suit of the sort affected by tourists. There was a good deal of money in his pockets—bank-notes, gold, and silver—and an expensive watch and chain, and other such things that a gentleman would carry; and it seemed very evident that robbery had not been the motive of the murderers. But of papers that could identify the man there was nothing—in the shape of paper or its like there was not one scrap in all the clothing, except the return half of a railway ticket between Peebles and Coldstream, and a bit of a torn bill-head giving the name and address of a tradesman in Dundee.

"There's something to go on, anyway," remarked Chisholm, as he carefully put these things aside after pointing out to us that the ticket was dated on what was now the previous day (for it was already well past midnight, and the time was creeping on to morning), and that the dead man must accordingly have come to Coldstream not many hours before his death; "and we'll likely find something about him from either Dundee or Peebles. But I'm inclined to think, Mr. Hugh," he continued, drawing me aside, "that even though they didn't rob the man of his money and valuables, they took something else from him that may have been of much more value than either."

"What?" I asked.

"Papers!" said he. "Look at the general appearance of the man! He's no common or ordinary sort. Is it likely, now, such a man would be without letters and that sort of thing in his pockets? Like as not he'd carry his pocket-book, and it may have been this pocket-book with what was in it they were after, and not troubling about his purse at all."

"They made sure of him, anyway," said I, and went out of the room where they had laid the body, not caring to stay longer. For I had heard what the doctor said—that the man had been killed on the spot by a single blow from a knife or dagger which had been thrust into his heart from behind with tremendous force, and the thought of it was sickening me. "What are you going to do now?" I asked of Chisholm, who had followed me. "And do you want me any more, sergeant?—for, if not, I'm anxious to get back to Berwick."

"That's just where I'm coming with you," he answered. "I've my bicycle close by, and we'll ride into the town together at once. For, do you see, Mr. Hugh, there's just one man hereabouts that can give us some light on this affair straightaway—if he will—and that the lodger you were telling me of. And I must get in and see the superintendent, and we must get speech with this Mr. Gilverthwaite of yours—for, if he knows no more, he'll know who yon man is!"

I made no answer to that. I had no certain answer to make. I was already wondering about a lot of conjectures. Would Mr. Gilverthwaite know who the man was? Was he the man I ought to have met? Or had that man been there, witnessed the murder, and gone away, frightened to stop where the murder had been done? Or—yet again—was this some man who had come upon Mr. Gilverthwaite's correspondent, and, for some reason, been murdered by him? It was, however, all beyond me just then, and presently the sergeant and I were on our machines and making for Berwick. But we had not been set out half an hour, and were only just where we could see the town's lights before us in the night, when two folk came riding bicycles through the mist that lay thick in a dip of the road, and, calling to me, let me know that they were Maisie Dunlop and her brother Tom that she had made to come with her, and in another minute Maisie and I were whispering together.

"It's all right now that I know you're safe, Hugh," she said breathlessly. "But you must get back with me quickly. Yon lodger of yours is dead, and your mother in a fine way, wondering where you are!"

CHAPTER V

THE BRASS-BOUND CHEST