This is the smaller school atlas version of the famous map based largely on Fremont's map of 1845. Inset "Map of the Columbia River from the Cascades to the Pacific Ocean." Upper California extends eastward to the Rio Grande and Oregon Territory extends to the Continental Divide. Shows the Oregon Route in good detail as it winds from the Sweetwater River through South Pass to Oregon City. Numerous Indian tribes and villages noted, forts and much more. An early depiction of the Great Interior Basin of California. The boundary between the United States and Canada is at the 49th parallel.

References: Wheat (Gold) #28.

Condition: B

Very nice full original hand coloring and full margins. A couple small spots and an area of light stain in Mexico, else very good.