Lewis and Clarke's Journal to the Rocky Mountains in the Years 1804-06 is a historical account of the famous American expedition led by Meriwether Lewis and William Clarke. The book, first published in 1847, was written by Patrick Gass, a sergeant in the Corps of Discovery, who was one of the few members of the expedition to keep a journal.The book provides a detailed and fascinating account of the journey, which began in St. Louis, Missouri, in May...