Bridge was in the lead, moving steadily forward that they might put as much distance as possible between themselves and the detective should the latter chance to explore the wood. They had advanced a few hundred yards when the path crossed through a small clearing the center of which was destitute of fallen leaves. Here the path was beaten into soft mud and as Bridge came to it he stopped and bent his gaze incredulously upon the ground. The girl and the youth, halting upon either side, followed the direction of his eyes with theirs. The girl gave a little, involuntary gasp, and the boy grasped Bridge's hand as though fearful of losing him. The man turned a quizzical glance at each of them and smiled, though a bit ruefully. “It beats me,” he said. “What can it be?” whispered the boy. “Oh, let's go back,” begged the girl. “And go along to father with Burton?” asked Bridge. The girl trembled and shook her head. “I would rather die,” she said, firmly. “Come, let's go on.” The cause of their perturbation was imprinted deeply in the mud of the pathway--the irregular outlines of an enormous, naked, human foot--a great, uncouth foot that bespoke a monster of another world. While, still more uncanny, in view of what they had heard in the farm house during the previous night, there lay, sometimes partially obliterated by the footprints of the THING, the impress of a small, bare foot--a woman's or a child's--and over both an irregular scoring that might have been wrought by a dragging chain! In the loft of his father's hay barn Willie Case delved deep into the small red-covered volume, HOW TO BE A DETECTIVE; but though he turned many pages and flitted to and fro from preface to conclusion he met only with disappointment. The pictures of noted bank burglars and confidence men aided him not one whit, for in none of them could he descry the slightest resemblance to the smooth faced youth of the early morning. In fact, so totally different were the types shown in the little book that Willie was forced to scratch his head and exclaim “Gosh!” many times in an effort to reconcile the appearance of the innocent boy to the hardened, criminal faces he found portrayed upon the printed pages.