“And that the fastenings to the house were all found secure this morning; just so.”

“He did not tell me that. In that case”—and I shuddered—“the murderer must have been in the house all night.”

Mr. Gryce smiled darkly at the door-knob.

“It has a dreadful look!” I exclaimed.

Mr. Gryce immediately frowned at the door-knob.

And here let me say that Mr. Gryce, the detective, was not the thin, wiry individual with the piercing eye you are doubtless expecting to see. On the contrary, Mr. Gryce was a portly, comfortable personage with an eye that never pierced, that did not even rest on you. If it rested anywhere, it was always on some insignificant object in the vicinity, some vase, inkstand, book, or button. These things he would seem to take into his confidence, make the repositories of his conclusions; but as for you—you might as well be the steeple on Trinity Church, for all connection you ever appeared to have with him or his thoughts. At present, then, Mr. Gryce was, as I have already suggested, on intimate terms with the door-knob.

“A dreadful look,” I repeated.

His eye shifted to the button on my sleeve.

“Come,” he said, “the coast is clear at last.”

Leading the way, he mounted the stairs, but stopped on the upper landing. “Mr. Raymond,” said he, “I am not in the habit of talking much about the secrets of my profession, but in this case everything depends upon getting the right clue at the start. We have no common villainy to deal with here; genius has been at work. Now sometimes an absolutely uninitiated mind will intuitively catch at something which the most highly trained intellect will miss. If such a thing should occur, remember that I am your man. Don’t go round talking, but come to me. For this is going to be a great case, mind you, a great case. Now, come on.”