There was one drawback upon conviviality for this party, in the extreme difficulty of getting food for their animals; for the food and fuel so abundant for themselves did not suffice for their horses. Snow covered the ground, and the trappers were obliged to gather willow twigs, and strip the bark from cottonwood trees, in order to keep them alive. The inner bark of the cottonwood is eaten by the Indians when reduced to extreme want. Beside, the cold brought the buffalo down upon them in large herds, to share the nourishment they had provided for their horses. Spring at length opened, and gladly they again commenced trapping; first on the Yellowstone, and soon on the head waters of the Missouri, where they learned that the Blackfeet were recovered from the sickness of last year, which had not been so severe as it was reported, and that they were still anxious and in condition for a fight, and were encamped not far from their present trapping grounds. Carson and five men went forward in advance "to reconnoitre," and found the village preparing to remove, having learned of the presence of the trappers. Hurrying back, a party of forty-three was selected from the whole, and they unanimously selected Carson to lead them, and leaving the rest to move on with the baggage, and aid them if it should be necessary when they should come up with the Indians, they hastened forward, eager for a battle. Carson and his command were not long in overtaking the Indians, and dashing among them, at the first fire killed ten of their braves, but the Indians rallied, and retreated in good order. The white men were in fine spirits, and followed up their first attack with deadly result for three full hours, the Indians making scarce any resistance. Now their firing became less animated as their ammunition was getting low, and they had to use it with extreme caution. The Indians, suspecting this from the slackness of their fire, rallied, and with a tremendous whoop turned upon their enemies. Now Carson and his company could use their small arms, which produced a terrible effect, and which enabled them again to drive back the Indians. They rallied yet again, and charged with so much power, and in such numbers, they forced the trappers to retreat. During this engagement, the horse of one of the mountaineers was killed, and fell with his whole weight upon his rider. Carson saw the condition of the man, with six warriors rushing to take his scalp, and reached the spot in time to save his friend. Leaping from the saddle, he placed himself before his fallen companion, shouting at the same time for his men to rally around him, and with deadly aim from his rifle, shot down the foremost warrior. The trappers now rallied about Carson, and the remaining five warriors retired, without the scalp of their fallen foe. Only two of them reached a place of safety; for the well aimed fire of the trappers leveled them with the earth.