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about the expedition discoveries Among the Shoshone August
08-24, 1805 On August 11 Lewis spotted an Indian on horseback.
It was a Shoshone at last, the first Indian they had seen since
Fort Mandan. The Shoshone led the expedition to his chief, who
in a dramatic stroke of luck turned out to be Sacagawea’s
brother. Soon the captains—with Sacagawea translating—were
bargaining with the chief, Cameahwait, for horses. Without these
horses, their chances of reaching the Pacific would likely have
been quashed. At first, a knife and an old shirt were enough to
purchase a horse. But the price went up every day, until Clark
had to offer his knife, his pistol, and a hundred rounds of
ammunition for a single animal. Most of the horses were in poor
condition. The captains also secured information from the
Shoshone. An old man of the tribe described a trail that led
across the Continental Divide. The trail was used by the Nez
Perce, who lived on the far side of