The sun had set gloriously in a clear and golden west. While camp was being located in the open, the broad expanse of rolling plain quickly empurpled; and in the twilight Terry staked out Duke, by a rope and a strap around his fore-leg, and Jenny by a rope around her neck. When supper was finished, and the dishes scoured with twigs to save the water, the first stars had appeared in the sky. Just before closing his eyes to sleep, Terry from his buffalo robe gazed up and sighed contentedly. It was a fine night. The coyotes and the larger wolves seemed unusually busy. Their yaps and howls sounded frequently. Several times during the night Terry was conscious that Shep growled, and that Duke and Jenny were uneasy; he heard also a low rumble, as of distant thunder, but he was too sleepy to sit up and look about. When he did unclose his eyes, to blink for a moment, he saw that the stars were still vivid in the blue-black sky overhead. This was the last thought--and next he awakened with a start, to pink dawn and Harry's ringing shout: "Buffalo! Great Scott! Look at the buffalo!" Harry was up, standing near the cart and gazing to the east. Up sprang Terry, too, and gazed. The rumble was distinct. A miracle had occurred between darkness and dawn--all the plain to the east was black with a living mass which had flowed upon it during the night. Buffalo! "I should say!" gasped Terry. "Must be ten thousand of them," called Harry. "Look out for Jenny and Duke!" Jenny was snorting, as the morning breeze bore the reek of the vast herd to her nostrils. No, mules did not like buffalo. Duke's head was high, as he stared. Harry had partially dressed; now he hurried to quiet the team. Terry drew on his trousers and boots and hastened after. The buffalo were grazing, and seemed to be drifting slowly this way. The hither fringe was not a quarter of a mile from the camp. Bulls bellowed and pawed and rolled, calves gamboled and breakfasted, and around the mass prowled great gray buffalo wolves, waiting their chances. All was wondrously clear in the first rays of the rising sun. Harry led the restive Jenny to the wagon and tied her short. "I think we'd better get right out of here," he announced, as he helped Terry and Shep drive the equally restive Duke in. "The coast ahead is clear. But if we wait for breakfast or anything, that herd's liable to be on top of us." "Let's hustle, then," agreed Terry. "They're coming this way, sure. I heard 'em, in the night, but I didn't know what it was." "Same here," confessed Harry, as they hustled to put Duke and Jenny to the cart, and pitch the camp stuff inside. "Funny where such a mob rose from. Reckon something set 'em traveling." Jenny was quite ready to leave, but Duke was more reluctant. However, on started the Pike's Peak Limited again. "We'll stop for breakfast when we're at a safer distance," quoth Harry. "Hope we reach water tonight."