The Simpson report is one of the first thorough surveys in New Mexico. Related to it are the many handsome plates, as well as one of the maps. The other map shows the routes across Texas.

Contains a report by George McClellan regarding troops of European and Asian nations.

Describes the author explorations in the Oregon and California territory from 1842 to 1846. Contains detailed descriptions of the geography, botany, and other scientific findings of the regions.

Documents and reports related to a cession of surplus lands by the Nez Percé tribe.

Preliminary report seeking to establish the line.

Extensive report on Indians and conditions in Alaska.

Contains a preliminary chapter on Hall's three expeditions and the Franklin search, and two chapters on the preparations for the second expedition.