Map of Oregon and Upper California From the Surveys of John Charles Fremont And other Authorities with Fremont's Geographical Memoir

This is one of the most significant maps of the American West, illustrating John Charles Fremont's third expedition. This includes the original "Fremont's Geographical Memoir" in the original wrappers.

Carl Wheat states:

“in the history of the American West, the year 1848 is signalized by three events above all others, the discovery of gold at Sutter’s Mill…the formal close of the Mexican War… which brought the cession of California and New Mexico… and the creation of the Territory of Oregon… All three events figure in the characteristic maps produced during the year, and particularly the cartographic monument of 1848, the magnificent ‘Map of Oregon and Upper California’” (Wheat,Transmississippi West, vol. 3 p. 49)
The map was originally published to accompany Fremont’s Geographical Memoir upon Upper California. 

“The map and Geographical Memoir have a two-fold importance in history, first as contributions to geographical knowledge in the year 1848, and second as historic documents concerning Fremont’s notable 3rd expedition… [The map] is a wonderfully graphic report on where the expedition of 1845-46 went and what it saw… As a contribution to cartographical knowledge, the case for the map was well put by Fremont himself: ‘The map has been constructed expressly to exhibit the two countries of Oregon and the Alta California together. It is believed to be the most correct that has appeared of either of them; and it is certainly the only one that shows the structure and configuration of the interior of Upper California’” (Wheat, Transmississippi West, vol. 3 p. 56)