With the first dawn of morning, the hunters left their rude shelter and resumed the chase. William, in consequence of following a fawn too ardently, separated from his companions, and in trying to rejoin them became bewildered. Hour after hour he sought in vain for some mark by which he might thread the intricacy of the forest, the trees of which were so thick that it was but seldom that he could catch a glimpse of the sun; and not being much accustomed to the woodman's life, he could not find his way as one of them would have done, by noticing which side of the trees was most covered with moss or lichen. Several times he started in alarm, for he fancied that he could see the glancing eyeballs of some lurking Indian, and he often raised his gun to his shoulder, prepared to sell his life as dearly as he could. Toward sunset the trees lessened and grew thinner, and by and by he found himself upon the outskirts of an immense prairie, covered with long grass, and here and there with patches of low trees and brushwood. A river ran through this extensive tract, and toward it Sullivan directed his lagging footsteps. He was both faint and weary, not having eaten anything since the morning. On the bank of the river there were many bushes, therefore Sullivan approached with caution, having placed his rifle at half-cock, to be in readiness against any danger that might present itself. He was yet some yards from its brink, when a rustling in the underwood made him pause, and the next instant out rushed an enormous buffalo. These animals usually roam through the prairies in immense herds, sometimes amounting to many thousands in number; but occasionally they are met with singly, having been separated from the main body either by some accident, or by the Indians, who show the most wonderful dexterity in hunting these formidable creatures. The buffalo paused for a moment, and then lowering his enormous head, rushed forward toward the intruder. Sullivan took aim; but the beast was too near to enable him to do so with that calmness and certainty which would have insured success, and though slightly wounded, it still came on with increased fury. Sullivan was a very powerful man, and though weakened by his long fast and fatiguing march, despair gave him courage and nerved his arm with strength, and with great presence of mind he seized the animal as it struck him on the side with its horn, drawing out his knife with his left hand, in the faint hope of being able to strike it into his adversary's throat. But the struggle was too unequal to be successful, and the buffalo had shaken him off, and thrown him to the ground, previous to trampling him to death, when he heard the sharp crack of a rifle behind him, and in another instant the animal sprang into the air, then fell heavily close by, and indeed partly upon, the prostrate Sullivan. A dark form in the Indian garb glided by a moment after, and plunged his hunting-knife deep into the neck of the buffalo,