This is a very early map illustrating the Lewis and Clark expedition, and locates parts of their route from the mouth of the Missouri River westward through North America to the Pacific Ocean, during the years 1804-1806. Wheat notes that "Tardieu had no Lewis and Clark map to assist him, but he apparently had at hand Meriwether Lewis's brief letter-report to Jefferson, and he did his best to locate on his map at least a few of the Expedition's points of geographic interest. His available topography, based as it was on Soulard, was both skimpy and erroneous, but his use of the quoted legends showed much ingenuity." This map was published in the first French edition of a journal about the expedition written by Patrick Gass, who accompanied Lewis and Clark on their expedition. This map was not included in Gass' first edition of his journal, The Corps of Discovery, which was published in 1807.

References: Wheat [TMW] #300.

Condition: B+

Issued folding, with light offsetting and a few small spots.