"At this time o' year, gentlemen, things do grow wonderful," he said slowly. "In this sort o' ground, where there's wet an' shade, there's a kind o' constant movement. This here new print is clean, an' the broken grass an' crushed leaves haven't had time to straighten themselves, as one might say. But, in this other lot, the shoots are commencin' to perk up, an' insec's have stirred the mold. It's just the difference atween a new run for rabbits and an old 'un." "Thank you, Bates," broke in Winter sharply. "Now, we must not waste any more time in demonstrations. Mr. Furneaux explained this thing purposely, to show the folly of jumping at conclusions. Innocent men have been hanged before today on just such evidence as this. We should deem ourselves lucky that these footprints were found so soon after the crime was committed. Tomorrow, or next day, there might have been a doubt in our minds. Luckily there is none. The man who shot Mr. Fenley this morning--" he paused; Furneaux alone appreciated his difficulty--"could not possibly have left those marks today." It was a lame ending, but it sufficed. Four of his hearers took him to mean that the unknown, whose feet had left their impress in the soil could not have been the murderer; but Furneaux growled in French-- "You tripped badly that time, my friend. You need another cigar!" Seemingly, he was soliloquizing, and none understood except the one person for whose benefit the sarcasm was intended. Winter felt the spur, but because he was a really great detective it only stimulated him. Nothing more was said until the little procession reached the avenue. During their brief disappearance in the leafy depths two cars and three motor cycles had arrived at The Towers. A glance sufficed. The newspapers had heard of the murder; this was the advance guard of an army of reporters and photographers. Winter buttonholed the Inspector. "I'll tell you the most valuable service you can render at this moment," he said. "Arrange that a constable shall mount guard at the rock till nightfall. Then place two on duty. With four men you can provide the necessary reliefs, but I want that place watched continuously, and intruders warned off till further notice. This man who happens to be here might go on duty immediately. Then you can make your plans at leisure." Thus, by the quaint contriving of chance, Police Constable Farrow, whose stalwart form and stubborn zeal had blocked the path to the Quarry Wood since a few minutes after ten o'clock, was deputed to continue that particular duty till a comrade took his place. His face fell when he heard that he was condemned to solitude, shut out from all the excitement of the hour, debarred even, as he imagined, from standing on the rock and watching the comings and goings at the mansion. But Winter was a kindly if far-seeing student of human nature.