"Not this evening," pleaded Draper. "I'm feeling rather—this affair, you know, has upset me. I couldn't give proper attention—"

His sentence petered out into a hesitating mumble, and the officer looked at him in evident surprise at his nervous, embarrassed manner. His own attitude, however, was perfectly firm, though polite.

"I don't like pressing you, sir," said he, "but time is precious—we'll have to go single file here; this pond is a public nuisance. They ought to bank it up at this end. After you, sir."

The pond to which the sergeant alluded had evidently extended at one time right across the path, but now, thanks to the dry weather, a narrow isthmus of half-dried mud traversed the morass, and along this Mr. Draper proceeded to pick his way. The sergeant was about to follow, when suddenly he stopped short with his eyes riveted upon the muddy track. A single glance showed me the cause of his surprise, for on the stiff, putty-like surface, standing out with the sharp distinctness of a wax mould, were the fresh footprints of the man who had just passed, each footprint displaying on its sole the impression of stud-nails arranged in a diamond-shaped pattern, and on its heel a group of similar nails arranged in a cross.

The sergeant hesitated for only a moment, in which he turned a quick startled glance upon us; then he followed, walking gingerly along the edge of the path as if to avoid treading in his predecessor's footprints. Instinctively we did the same, following closely, and anxiously awaiting the next development of the tragedy. For a minute or two we all proceeded in silence, the sergeant being evidently at a loss how to act, and Mr. Draper busy with his own thoughts. At length the former spoke.

"You think, Mr. Draper, you would rather that I looked in on you to-morrow about this affair?"

"Much rather, if you wouldn't mind," was the eager reply.

"Then, in that case," said the sergeant, looking at his watch, "as I've got a good deal to see to this evening, I'll leave you here, and make my way to the station."

With a farewell flourish of his hand he climbed over a stile, and when, a few moments later, I caught a glimpse of him through an opening in the hedge, he was running across the meadow like a hare.

The departure of the police-officer was apparently a great relief to Mr. Draper, who at once fell back and began to talk with us.