“Well, I gave my mind a thorough rest by plunging into a chemical analysis. One of our greatest statesmen has said that a change of work is the best rest. So it is. When I had succeeded in dissolving the hydrocarbon which I was at work at, I came back to our problem of the Sholtos, and thought the whole matter out again. My boys had been up the river and down the river without result. The launch was not at any landing-stage or wharf, nor had it returned. Yet it could hardly have been scuttled to hide their traces,—though that always remained as a possible hypothesis if all else failed. I knew this man Small had a certain degree of low cunning, but I did not think him capable of anything in the nature of delicate finesse. That is usually a product of higher education. I then reflected that since he had certainly been in London some time—as we had evidence that he maintained a continual watch over Pondicherry Lodge—he could hardly leave at a moment’s notice, but would need some little time, if it were only a day, to arrange his affairs. That was the balance of probability, at any rate.”

“It seems to me to be a little weak,” said I. “It is more probable that he had arranged his affairs before ever he set out upon his expedition.”

“No, I hardly think so. This lair of his would be too valuable a retreat in case of need for him to give it up until he was sure that he could do without it. But a second consideration struck me. Jonathan Small must have felt that the peculiar appearance of his companion, however much he may have top-coated him, would give rise to gossip, and possibly be associated with this Norwood tragedy. He was quite sharp enough to see that. They had started from their head-quarters under cover of darkness, and he would wish to get back before it was broad light. Now, it was past three o’clock, according to Mrs. Smith, when they got the boat. It would be quite bright, and people would be about in an hour or so. Therefore, I argued, they did not go very far. They paid Smith well to hold his tongue, reserved his launch for the final escape, and hurried to their lodgings with the treasure-box. In a couple of nights, when they had time to see what view the papers took, and whether there was any suspicion, they would make their way under cover of darkness to some ship at Gravesend or in the Downs, where no doubt they had already arranged for passages to America or the Colonies.”

“But the launch? They could not have taken that to their lodgings.”