4 books
Diary of a Journey from the Mississippi to the Coasts of the Pacific with a United States Government Expedition, Volume 1 - Primary Source Edition
Report of Explorations for a Railway Route, Near the Thirty-Fifth Parallel of Latitude
Report of Explorations for a Railway Route, Near the Thirty-Fifth Parallel of Latitude; From the Mississippi River to the Pacific Ocean
Diary of a Journey from the Mississippi to the Coasts of the Pacific with a United States Government Expedition Volume 1