Unable to determine the course the bear had taken across this trackless place, I walked round it, keeping all the time in the snow. When more than halfway round I came upon his tracks leaving the bare place. Here he had changed his direction of travel abruptly from north to east, crossed his former trail, gone on a few yards farther, and then abruptly changed from east to north. I hurried along his tracks. After a few miles I saw where perhaps the night before he had eaten part of the carcass of a bighorn. To judge from tooth marks, the sheep had been killed by wolves. The trail continued in general northward, parallel to the summit and a little below it. As I followed, the tracks approached timber-line, the trees being scattered and the country quite open. Suddenly the trail broke off to the right for five or six hundred feet into the woods, as though Old Timberline had remembered an acquaintance whom he must see again. He had hustled along straight for a much-clawed Engelmann spruce, a tree with bear-claw and tooth marks of many dates, though none were recent. Old Timberline, apparently, had smelled the base of the tree and then risen up and sniffed the bark as high as his nose could reach. He had neither bitten nor clawed. Then he had gone to two near-by trees, each of which had had chunks bitten or torn out, and here smelled about. Retracing his tracks to where the trail had turned off abruptly, the bear resumed his general direction northward. When he stopped on a ridge and began digging, I hurried across a narrow neck of woods and crept up as close as I dared. A wagon-load of dirt and stones had been piled up. While I watched the digging, a woodchuck rushed out, only to be overtaken and seized by the bear, who, having finished his meal, shuffled on out of sight. I followed the trail through woods, groves, and openings. After an hour or more without seeing the grizzly, I climbed a cliff, hoping to get a glimpse of him on some ridge ahead. I could see his line of tracks crossing a low ridge beyond and felt that he might still be an hour or so in the lead. But, in descending from the cliff, I chanced to look back along my trail. Just at that moment the bear came out of the woods behind me. He was trailing me! I do not know how he discovered that I was following him. He may have seen or scented me. Anyway, instead of coming directly back and thus exposing himself, he had very nearly carried out his well-planned surprise when I discovered him. I found out afterwards that he had left his trail far ahead, turning and walking back in his own footprints for a distance, and trampling this stretch a number of times, and that he had then leaped into scrubby timber and made off on the side where his tracks did not show in passing along the trampled trail. He had confused his trail where he started to circle back, so as not to be noticed, and slipped in around behind me.