"I don't know quite what to think," replied Westgate, "but I am not satisfied. There is something in the affair that does not meet the eye; there is something behind it all. For one thing, I feel as certain as I am of being alive that the solution of the mystery rests with Cooper Silwood. It turns on him as on a pivot. I take no stock in the tramp's story of his seeing a workman coming out of Lincoln's Inn on the night of Thornton's disappearance. If the tramp was in Chancery Lane at the time he said he was, how was it he saw nothing of Morris Thornton? Morris Thornton was undoubtedly in the Lane--at least it is altogether likely--at or about the time the tramp said he was there. But, in any case, who would trust the story of a tramp by itself? Why, you can pick up a waster of the same kind any night of the year you like, and he'll pitch you any yarn he thinks you want. No, the case turns on Silwood." "Well, suppose I grant you that, what then? If the solution lies with Silwood, it will continue to rest with him, as he is dead. You run your head up against a stone wall, Westgate. Silwood's death ends the thing pretty finally." "Silwood dead!" cried Westgate, pursuing his own train of thought. "Just think of it! Isn't it the strangest thing in the world? In the way of coincidence it beats anything I ever heard of. Consider, for a second. Suppose, for the sake of argument, it had been proved that Thornton was murdered, and that the murder was committed by Silwood, what a fortunate event Silwood's dying at this precise juncture would be for Silwood! You see that, don't you?" "Of course, the coincidence is remarkable, but what more can you say about it? Silwood is dead, and that settles everything--so far as it can be settled. There does not seem to be much more to say." "Though it does not appear to be much good," persisted Westgate, "still, the key of the situation, as I said before, lies with Silwood. I wish I knew more about that man. Personally, I feel certain that Silwood, when he went off for his holiday that Saturday morning, locked the door on the dead body of Thornton." "How you harp on this, Westgate! You have no evidence for what you say, either." "There is a strong presumption, however." "The exact time of Thornton's death is not known, yet you are arguing as if it was. You cannot say for certain that Thornton was dead that morning at all." "The doctors agreed that Thornton had been dead about fifteen days when the body was found. That brings his death pretty well, or, at any rate, very close, to the time of his disappearance." "Still there might be a gap of a good many hours."