ROSS, JOHN
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. London: Robert Sayer, June 1775. Second issue (following the first of 1772) of this map, likely extracted from Thomas Jeffreys' The American Atlas. Two conjoined sheets, 44 5/8 x 14 inches to platemarks (113.4 x 53.6 cm), outline color on the course of the river. Usual folds , some nominal toning, a few small flecks and marks but generally very clean. Framed, not examined out of frame.

The first map of the Mississippi based on English sources, this second issue is with alterations in the New Orleans region, including the addition of Forts St. Leon and St. Mary. Showing the central and lower course of the Mississippi, the various features along the river are shown, along with tribal territories (with notes of tribal alliances etc.). The work was issued in Thomas Jefferys' 1776 atlas, and was thus the primary geographical resource for the region for British officers during the Revolutionary War. Phillips Maps of America p. 439 etc.