Still, for me the pleasure of autumn was now only a background against which my thoughts of Halfspoor the bear marched in orderly fashion while I reviewed them one by one. I recalled his slayings of men, his occasional and very skillful stalking of the night watchers in their trees at either end of our valley. I remembered how on this morning he would be found asleep in his old lair under the two fallen petrified tree ferns downstream near the Blue Brook, while on that morning he would be gnawing the bones of bison or cave cat or perhaps even of jackal-rat (for he was a dirty feeder, was Halfspoor), far up the Crimson. I visualized his footprint, unique among knifetooth bears, measuring as long as my arm from wrist to shoulder, and with three outer toes gone from the right hind pug. As I waded through the Gray Brook's chilled waters I could almost imagine that I saw the maimed sign of his pad on the silver strand before me. "How well I know that track!" I exclaimed to myself, with an egotistic pride in my craft; and then I came out of the waters to find that, far from so clearly imagining it in all its enormous crippled particulars, I had actually been looking at the veritable track of Halfspoor himself. I was exultant and humiliated at the same time. Halting above it, I tested my bow once more, and counted the fourteen bone-pointed arrows in their quiver that I had made from the paw and forearm pelt of another knifetooth bear, my lucky quiver with the claws still hanging from its tip. The metal knife was in its sheath at my hip, the bone hatchet dangled from a sling handy to my left hand. I took a deep breath and began to follow the great mutilated prints overland toward the second of the three streams. Soon I had crossed the Blue and was approaching the Crimson Brook. Halfspoor was perhaps two hours ahead of me. Where he had trodden in sand, the water had filled his track, and where he had ambled heavily across grassy spaces, the blades had sprung nearly to uprightness again. He was traveling slowly, inspecting logs and coverts, probably talking to himself in the gruff complaining whine of his breed. Here and there he had lingered a moment or two, and in these places I could often catch a whiff of his rank ursine odor. * * * * *