our animals were, as we approached Snake River every nerve seemed strung to the utmost; our animals became frantic and unmanageable; they rushed forward at full speed and plunged into the first water they saw. Fortunately for them and the riders, the water was only about three feet deep; water appeared to be preferred to air; they plunged their heads deep in and held their breaths till their thirst was relieved. This plain is bounded on the north and east by spurs of the Rocky and Bear River mountains; on the south and west by the high plains of Portneuf and Snake River valleys. There is a range of mountains commencing on the northwest of this plain, extending west and north along Snake River, dividing the waters of the Snake and La Rivière aux Bois (the wooded river.) This whole plain has the appearance of having been one vast lake of lava, spread over the whole surrounding country, appearing to have issued from the three basaltic mountains in the midst of it. I noticed, as we passed between the two, which were probably not more than ten miles apart, that we appeared to be on higher rock than in any direction around us. From this fact I concluded that the three must have been pouring out their volcanic lava at the same time and ceased together, leaving the country comparatively level. The small amount of soil found upon the surface, as well as the barrenness of the rock, indicated no distant period of time when this volcanic plain had been formed. At Fort Hall we had another overhauling and lightening of baggage. The Doctor was advised to take his wagon apart and pack it, if he calculated to get it through the terrible cañons and deep, bottomless creeks we must pass in going down Snake Plains. Miles Goodyear, the boy we picked up two days from Fort Leavenworth, who had been assigned to assist the Doctor, was determined, if the Doctor took his wagon any further, to leave the company. He was the only one that could be spared to assist in this wild, and, as all considered, crazy undertaking. Miles was furnished a couple of horses, and the best outfit the mission party could give him for his services, and allowed to remain or go where he might choose. In his conclusions, he was influenced by the stories he heard about the treatment he might expect should he reach the lower Columbia. His idea of liberty was unlimited. Restraint and obedience to others was what he did not like at home; he would try his fortune in the mountains; he did not care for missionaries, Hudson's Bay men, nor Indians; he was determined to be his own man, and was allowed to remain at Fort Hall. This loss of manual strength to the mission party compelled the Doctor to curtail his wagon, so he made a cart on two of the wheels, placed the axletree and the other two wheels on his cart, and about the 1st of August, 1836, our camp was again in motion. As we reached camp on Portneuf the first night, in passing a bunch of willows, Mrs.