Meanwhile the enemy, a large mink, was following on the trail with the dogged persistence of a sleuth-hound. Sure of his methods, he did not pause to see what the quarry was doing, but kept his eyes and nose occupied with the fresh tracks. His speed was not less than that of the rabbit, and his endurance was vastly greater. Being very long in the body, and extremely short in the legs, he ran in a most peculiar fashion, arching his lithe back almost like a measuring-worm and straightening out like a steel spring suddenly released. These sinuous bounds were grotesque enough in appearance, but singularly effective. The trail they made, overlapping that of the rabbit, but quite distinct from it, varied according to the depth of the surface snow. Where the snow lay thin, just deep enough to receive an imprint, the mink's small feet left a series of delicate, innocent-looking marks, much less formidable in appearance than those of the pad-footed fugitive. But where the loose snow had gathered deeper the mink's long body and sinewy tail from time to time stamped themselves unmistakably. When the mink reached the second thicket, his keen and experienced craft penetrated at once the poor ruses of the fugitive. Cutting across the circlings of the trail, he picked it up again with implacable precision, making almost a straight line through the underbrush. When he emerged again into the open, the rabbit was in full view ahead. The next strip of woodland in the fugitive's path was narrow and dense. Below it, in a patch of hillocky pasture ground, sloping to a pond of steel-bright ice, a red fox was diligently hunting. He ran hither and thither, furtive, but seemingly erratic, poking his nose into half-covered moss-tufts and under the roots of dead stumps, looking for mice or shrews. He found a couple of the latter, but these were small satisfaction to his vigorous winter appetite. Presently he paused, lifted his narrow, cunning nose toward the woods, and appeared to ponder the advisability of going on a rabbit hunt. His fine, tawny, ample brush of a tail gently swept the light snow behind him as he stood undecided. All at once he crouched flat upon the snow, quivering with excitement, like a puppy about to jump at a wind-blown leaf. He had seen the rabbit emerging from the woods. Absolutely motionless he lay, so still that, in spite of his warm coloring, he might have been taken for a fragment of dead wood. And as he watched, tense with anticipation, he saw the rabbit run into a long, hollow log, which lay half-veiled in a cluster of dead weeds. Instantly he darted forward, ran at top speed, and crouched before the lower end of the log, where he knew the rabbit must come out.