The California Guide Book Comprising Colonel Fremont's Geographical Account of Upper California; Major Emory's Overland Journey from Fort Leavenworth in Missouri to San Diego in California, Including Parts of the Arkansas Del Norte and Gila Rivers; and Captain Fremont's Narrative of the Exploring Expedition to the Rocky Mountains, and to Oregon and North California. Accompanied with a Map of the Various Routes, and a Map of the Gold Regions