Wilkes map was a substantial improvement over the Hood map. Wheat was to call the map "quite extraordinary" although it is based largely on secondary sources. In fact a printed note on the map states "The northern part of this Map contains the latest information of the Hudson Bay Company, and the Eastern part, that of Lieut. Fremont...". It was for several years the best available map of the interior of Oregon. Shows the tribes of the West, with boundaries for each. Wheat 468.
Condition is exceptionally good for this map with no offsetting, no foxing and only a close lower left margin. Image size is 23.25 x 34.25 (inches), B&W.