Course of the River Mississippi, from the Balise to Fort Chartres: Taken on an Expedition to the Illinois, in the latter end of the Year 1765.

Course of the Mississippi River from the Balise to Fort Chartres based on surveys made by the French. Surrounding geographic features are noted with relief shown pictorially.
Date: June 1, 1775
Creator: Ross, Lieutenant
System: The UNT Digital Library

Map of Colorado Territory, Compiled from Government Maps & actual Surveys made in 1861.

Map of Colorado Territory compiled from government maps and surveys. Includes place names, rivers and some geographical features, with relief shown by hachures.
Date: November 1, 1861
Creator: Case, Francis M.
System: The UNT Digital Library