We needed force that day, for ours was to us a mighty prospect. There were urus, which Woof had discovered a day or two before, now pasturing in a not distant lowland, and the slaying of the urus was a great event comparable only to the rare killing of the aurochs, the mighty bison of the time. Woof had discovered a band of urus a day or two before feeding in a narrow valley which ended in a precipice some thirty feet in height as it neared the river. In this valley were various small mounds, and we could, by utilizing these, get the urus between us and the river, and by loud shouting and a sudden rush drive them in a panic to their deaths. This had been done once in the past and might be done again. We went eastward through the hills, until we could see the urus feeding below, and then crept down into the valley, ever keeping the little mounds between us and the grazing beasts, Ugh in the lead. Then something happened. There was a threatening bellow as Ugh crept by one of the mounds between us, and he sprang back, with abundant reason, for, within twenty yards of him was a huge bull feeding apart from the rest. For a moment the beast stood still, then, with lowered head and glaring eyes, charged savagely upon the hunter, while the rest of us fled, yelling. Not a moment too soon did Ugh leap and crouch beside the mound, but even his mortal peril did not destroy his hardihood. Even as he eluded the rush, he swung his club and brought it down with all his might as the brute swept by, seeking, by some chance, to stun him. It was not to be, nor, because of an amazing happening, was Ugh in further peril. It was the strange chance in a thousand, but the club, driven so hardly by that enormous, muscular arm, came fairly down upon the sharp point of one of the great horns and, dense and tough as was its fibre, split and impaled itself and was wrenched from the grip of Ugh as the beast crashed by. And then followed a grotesque spectacle. Stunned, dazed, crazed with the pain of the benumbing blow, the urus galloped blindly about in circles, bellowing and almost bleating and shaking its great head. The impaled club was flung off at last, flying a score of yards, and, a moment later, the beast, regaining his senses, went dashing off in the direction already taken by the flying herd. So ended the urus hunt. We had failed, but that hunt, in its indirect results, was vast in its effects upon the future of the Cave men. Ugh regained his weapon, split at its end, and, as we gathered again, stood gazing upon it ruefully. We wandered away to where the creek of the valley entered the river, and found crayfish and the eggs of waterfowl, and feasted merrily, and lay there resting in a place where the sun shone warm on the rocks.