Report of the Secretary of State, and accompanying documents, relative to the undetermined boundary line between Alaska and British Columbia.

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.

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