In 1831, an American Fur Company trapper, Warren Angus Ferris, noted that the two main Crow bands were located chiefly on the Yellowstone River and its tributaries, but their "war parties infest the countries of the Eutaws, Snakes, Arrapahoes, Blackfeet, Sious, and Chayennes" (Ferris, 1940, p. 305). He had this to say of the Eastern Shoshone (p. 310): Of the Snakes on the plains there are probably about four hundred lodges, six hundred warriors, and eighteen hundred souls. They range in the plains of Green River as far as the Eut Mountains; southward from the source to the outlet of Bear River, of the Big Lake; thence to the mouth of Porto-nuf [Portneuf], on Snake River of the Columbia.... They are at war with the Eutaws, Crows, and Blackfeet, but rob and steal from all their neighbors. Ferris saw few Indians in his travels through the Jackson Hole area in 1832 and 1833. However, in "Jackson's Little Hole," presumably at the south end of Hoback Canyon, he noted, in August, 1832, several large, abandoned camps, which he assumed were those of the "Grosventres of the prairies" (p. 158). The supposed Gros Ventre party was later seen on the Green River and was said to have consisted of 500 to 600 warriors (pp. 158-159). These may well have been Blackfoot, for Zenas Leonard reported a Blackfoot attack on the upper Snake River in western Wyoming in July, 1832 (Leonard, 1934, p. 51). The Indians most frequently sighted in the Green River region, however, were the Shoshone. In June, 1833, Ferris saw "several squaws scattered over the prairie engaged in digging roots" (Ferris, 1940, p. 205). These women apparently belonged to "some fifty or sixty lodges of Snakes, ... encamped about the fort [Bonneville's] who were daily exchanging their skins and robes, for munitions, knives, ornaments, etc., with the whites" (ibid., p. 206). Further evidence of the virtual absence of the Shoshone from Missouri waters in the fur period comes from Zenas Leonard. When preparing to spend the winter of 1832-33 on the Green River, the trappers met a party of 70 to 80 Crow who said "they were going to war with the Snake Indians--whose country we were now in--and they said also they belonged to the Crow nation on the East side of the mountains" (Leonard, 1934, pp. 82-83). These Crow stole horses from the party, and the trappers pursued them to their village at the mouth of the Shoshone River, near modern Lovell, Wyoming. In the summer of 1834, Captain Bonneville's trappers, one of whom was Zenas Leonard, trapped on the waters of Wind River, but no mention is made of Shoshone (ibid., pp. 224-226). In October, however, they met the Crow in the Big Horn Basin, and they wintered on Wind River in their company (pp. 255-256). No Shoshone were reported in the area.