Narrative of an Expedition to the Source of St. Peter's River, Lake Winnepeek, Lake of the Woods, and c. performed in the year 1823

First published in 1824, these two volumes report observations from the 1823 mapping expedition lead by Stephen Long, which included travel along the Minnesota River. Given Keating's official capacity on the trip as geologist, it is not surprising that his account includes great detail about geological characteristics. Additional observations include descriptions of the river (width, depth, current, and turbidity), primary tributaries and surrounding lands (vegetation, soils, prairies, marshes, wildlife, and Indian villages); a discussion of the Dakota name for the river-Watapan Menesota; and denunciations of prior claims by Jonathan Carver. A map of the territory and route covered by the expedition is included, which depicts the St. Peter's (Minnesota) River and tributaries.