He stepped carefully on to the earth bed, examining the prints with the utmost care. From where I stood I could see a number of well-defined “treads” and I readily appreciated the importance attached to them by both Baddeley and my companion. It was very evident that one person at least had crossed the rose-bed pretty recently to get beneath the billiard room window. It looked an outside job of course. Burglary evidently—Prescott had heard noises—come down to investigate—found the trouble in the billiard room and had interrupted the disturbers at the cost of his own life. But would burglars strangle their assailant with a shoe-lace? Surely not! The whole affair seemed to me to be most intricate and most involved. Still, the rain of the evening before had been a Godsend—there were the footmarks—telling some story to more than one pair of eyes. They might help the Inspector and I knew they would interest Anthony.

I looked across at him. He was evidently at a loss. Something on the wall beneath the window of the billiard room had apparently excited his attention. He scrutinized it most carefully, and then turned again to the prints. He shook his head.

“Bill!”

“Hullo?”

“Come over here, will you?”

I complied.

“Now, Bill, look at what I am going to show you, very carefully. I expected to find traces of Prescott somewhere out here—you, of course, noticed the mud on the shoes he is wearing—so that Baddeley’s announcement came as no surprise to me. The natural place to look for them was in the vicinity of the billiard room window, since that room was the last room he can have entered. Now, look here! Do you see that double line of tracks? Looks something like a 10, I should say. We can bank on those being Prescott’s. I’ll make sure later—but I’m certain of my ground.”

“In a double sense,” I grinned.

“Eh? Oh—I see——” he laughed. “I wasn’t thinking of what I had said. But do look. Here we have a distinct set of tracks that are undoubtedly Prescott’s, side by side with a similar set, undoubtedly again Prescott’s, leading in the reverse direction. The left-hand set, as we face the window, lead to the path, and the right-hand set lead to the window. Agree?”

I looked attentively at the footmarks. “Yes. It would seem so.”