[Illustration: Rendezvous scene.] Captain Benjamin L. E. Bonneville, a Frenchman of distinguished antecedents, applied in 1831 for a leave of absence from the U.S. Army for the joint purpose of exploration and trade. With funds provided by hopeful New York capitalists he organized an impressive company, including 110 men and twenty ox-drawn wagons, and on May 1, 1832, he set out from Fort Osage. Bonneville’s wagon train was the second to ascend the traditional overland route along the Platte and the Sweetwater, and the first to cross South Pass. In the Green River Valley on July 26 the Captain was overtaken by Fontenelle’s company. On the west side of the Green, five miles above Horse Creek, he started the erection of Fort Bonneville, while his rival encamped farther upstream, for his jaded horses and mules would budge no further. After Fontenelle’s departure, above noted, the Captain decided upon the advice of “free trappers,” to head for Salmon River for the winter. Leaving his cumbersome wagons at the fort, he cached most of his baggage and then packed the rest on mules and horses. The expedition set forth on August 22, reaching Teton Pass on September 3. Instead of taking the standard route via the Hoback, where hostile Indians waited in ambush, Captain Bonneville elected to take a long circuitous route to the headwaters of Green River, entering Jackson’s Hole via the Gros Ventre River. [Illustration: “Weapons of the Pierre’s Hole Fight”—Exhibit in Fur Trade Museum, Grand Teton National Park.] Following the rendezvous in Pierre’s Hole, the Rocky Mountain men conducted their fall hunt in the dangerous Blackfoot country around the Three Forks of the Missouri. In attempting to follow them, Vanderburgh of the American Fur Company was slain by the Blackfeet. During the winter of 1832-33 the various rival bands holed up along tributaries of the Snake and Salmon rivers; and at the first melting of the snow they resumed their feverish scramble for the prime hunting grounds. Most of the other trapping bands remained west of the Continental Divide to make their spring hunt, and approached the Green River rendezvous through Jackson’s Hole. The first to stir in this direction was the American Fur Company partisan Drips, who led the bulk of his forces, probably about sixty men, up Snake River, hunting and trapping as they went. At the junction of Salt River, they were compelled to leave the Snake to make the toilsome detour over the Snake River Range and Teton Pass, which they reached on May 31. Ferris vividly describes their journey through the “immense banks of snow on the mountain,” the fording of “Lewis River,” and the ascent of “Gros Vent’s Fork” to the head of Green River. He notes, “We found a large herd of buffalo in the valley, and killed several; also a large bear, which paid with his life the temerity of awaiting our approach.”