B Public Surveys in Iowa 1850

A very interesting map of the state of the surveys of the PLSS in the relatively new State of Iowa in 1850. The primary waterways of the southeast part of the State are shown with minimal annotation. The very interesting detail of this map is the depiction of the South Boundary of the Sioux Indian Territory as defined by terms of the Treaty of July 15th, 1830. Southeast of that boundary is a note declaring the portion ceded to the United States on October 13, 1846.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.