This account—as modest and undemonstrative as Carson's feats were remarkable—covers his life as a trapper, Indian fighter, guide, and buffalo hunter up to the fall of 1856. Among the high spots during these years were his trapping expedition to California with Ewing Young (1829–1831), his celebrated duel with Shunar at the Green River rendezvous of 1837, the three expeditions with John C. Frémont (1842, 1843–1844, 1845), his exploits in the Mexican War (l846–1848), and his service as an Indian agent.