The journal of Captain Cooke states that the battalion marched from Fort Leavenworth, which was then called a cantonment, and, strange to say, had been abandoned by the Third Infantry on account of its unhealthiness. It was the 5th of June that Riley crossed the Missouri at the cantonment, and recrossed the river again at a point a little above Independence, in order to avoid the Kaw, or Kansas, which had no ferry. After five days' marching, the command arrived at Round Grove, where the caravan had been ordered to rendezvous and wait for the escort. The number of traders aggregated about seventy-nine men, and their train consisted of thirty-eight wagons drawn by mules and horses, the former preponderating. Five days' marching, at an average of fifteen miles a day, brought them to Council Grove. Leaving the Grove, in a short time Cow Creek was reached, which at that date abounded in fish; many of which, says the journal, "weighed several pounds, and were caught as fast as the line could be handled." The captain does not describe the variety to which he refers; probably they were the buffalo--a species of sucker, to be found to-day in every considerable stream in Kansas. Having reached the Upper Valley,[21] bordered by high sand hills, the journal continues: From the tops of the hills, we saw far away, in almost every direction, mile after mile of prairie, blackened with buffalo. One morning, when our march was along the natural meadows by the river, we passed through them for miles; they opened in front and closed continually in the rear, preserving a distance scarcely over three hundred paces. On one occasion, a bull had approached within two hundred yards without seeing us, until he ascended the river bank; he stood a moment shaking his head, and then made a charge at the column. Several officers stepped out and fired at him, two or three dogs also rushed to meet him; but right onward he came, snorting blood from mouth and nostril at every leap, and, with the speed of a horse and the momentum of a locomotive, dashed between two wagons, which the frightened oxen nearly upset; the dogs were at his heels and soon he came to bay, and, with tail erect, kicked violently for a moment, and then sank in death--the muscles retaining the dying rigidity of tension. About the middle of July, the command arrived at its destination--Chouteau's Island, then on the boundary line between the United States and New Mexico. Our orders were to march no further; and, as a protection to the trade, it was like the establishment of a ferry to the mid-channel of a river.