Hydrographical Basin of the Upper Mississippi River from Astrono - Central/S. America to the front range where

to the front range where they encountered "the Highest Peak" (now Longs Peak)

& Rhode Island shows good detail for towns and terrain

Image size is 16 x 19 (inches)

This is a fine example of their work with bold original hand color

Condition is good save for some discoloration to the centerfold

Hydrographical Basin of the Upper Mississippi River from Astrono - Central/S. America to the front range whereHydrographical Basin of the Upper Mississippi River from Astronomical and Barometrical Observations, Surveys and Information, by J. N. Nicollet in the years 1836, 37, 38 and 40 assisted by Lt. J. C. Fremont, of the Corps of Engineers under the direction of Col. J. J. Abert 1843 This is the first great map of the upper Mississippi basin. Nicollet came from France to conduct the survey according to the latest European methods and young Fremont was