Hydrographical Basin of the Upper Mississippi River from Astrono - Central/S. America & Rhode Island shows good

& Rhode Island shows good detail for towns and terrain

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

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

Two insets show detail for Greece and Italy

Hydrographical Basin of the Upper Mississippi River from Astrono - Central/S. America & Rhode Island shows goodHydrographical 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