They were now heading for Bent's Fort near the head of the Arkansas River. The storms in the hills were past, and they were riding over vast treeless prairies, where there was plenty of grass for the horses, and any amount of wild game if they could have stopped long enough to replenish their larder with it. Again and again they were forced to prairie expedients. Once, as they reached one of the tributaries of the Arkansas River, after a long and tedious day on the plains, they found the river frozen over with a layer of smooth, clear ice, hardly strong enough to bear a man. They must have wood, but although there was plenty of it on the other side, there was none on their shore of the stream. Whitman took the ax from his kit, and lying down on the thin ice, contrived with great caution and patience to make his way across. On the other bank he cut long poles and short cross-pieces. These he pushed across the ice to Lovejoy, and with them they made enough of a bridge for the latter to urge the horses and mules to try to cross. They all got over safely, though with much slipping and splashing. In cutting his last pole Whitman split the ax-helve. When they camped he bound the break with a deerskin thong, but that night a thieving wolf found the ax at the edge of the camp, wanted the fresh deerskin, and dragged away ax and thong. The loss would have been very serious if it had happened earlier in their journey. When they were within four days' ride of Bent's Fort they met a caravan traveling toward Taos. The leader told Whitman that a party of mountaineers was about leaving Bent's Fort for St. Louis, but added that Whitman and Lovejoy, hampered by their pack animals, would not be in time to join them. Whitman was very anxious to join the mountaineers if he could, and decided to leave Lovejoy and the guide with the pack-mules. Taking the fastest horse, and a small store of food, he rode on alone, hoping to catch the party. To do this he would have to travel on Sunday, something they had not done before. Lovejoy saw Dr. Whitman start on his ride, but when the former reached Bent's Fort four days later he was astonished to find that Whitman had not arrived there, nor been heard from. As that part of the country was full of packs of gray wolves, now half-starved on account of the snow, Lovejoy was alarmed. If not a prey to the wolves, Whitman must be lost; so his friend took a good guide from the Fort and started to search for him. He traveled up-river a hundred miles, and there fell in with Indians who told him of a lost white man who was trying to find the Fort, and whom they had directed down the river. Lovejoy went back, and late that afternoon saw Whitman come riding in, convinced that his journey had been so much delayed because he had traveled on Sunday.