I said that it seemed to be the most reasonable one possible, and to square with the common-sense view of the case.
"Yes," he replied, "perhaps it does. From the point of view of the jury, and on their information, their verdict was quite reasonable. Nevertheless, Mr. Foggatt did not shoot himself. He was shot by a rather tall, active young man, perhaps a sailor, but certainly a gymnast—a young man whom I think I could identify, if I saw him."
"But how do you know this?"
"By the simplest possible inferences, which you may easily guess, if you will but think."
"But, then, why didn't you say this at the inquest?"
"My dear fellow, they don't want my inferences and conjectures at an inquest, they only want evidence. If I had traced the murderer, of course then I should have communicated with the police. As a matter of fact, it is quite possible that the police have observed and know as much as I do—or more. They don't give everything away at an inquest, you know—it wouldn't do."
"But if you are right, how did the man get away?"
"Come, we are near home now. Let us take a look at the back of the house. He couldn't have left by Foggatt's landing door, as we know; and as he was there (I am certain of that), and as the chimney is out of the question—for there was a good fire in the grate—he must have gone out by the window. Only one window is possible—that with the broken catch—for all the others were fastened inside. Out of that window, then, he went."
"But how? The window is 50ft. up."
"Of course it is. But why will you persist in assuming that the only way of escape by a window is downward? See, now, look up there. The window is at the top-floor, and it has a very broad sill. Over the window is nothing but the flat face of the gable-end; but to the right, and a foot or two above the level of the top of the window, an iron gutter ends. Observe, it is not of lead composition, but a strong iron gutter, supported, just at its end, by an iron bracket. If a tall man stood on the end of the window-sill, steadying himself by the left hand and leaning to the right, he could just touch the end of this gutter with his right hand—the full stretch, toe to finger, is 7ft. 3in.; I have measured it. An active gymnast, or a sailor, could catch the gutter with a slight spring, and by it draw himself upon the roof. You will say he would have to be very active, dexterous, and cool. So he would. And that very fact helps us, because it narrows the field of inquiry. We know the sort of man to look for. Because, being certain (as I am) that the man was in the room, I know that he left in the way I am telling you. He must have left in some way, and all the other ways being impossible, this alone remains, difficult as the feat may seem. The fact of his shutting the window behind him further proves his coolness and address at so great a height from the ground."