Map of the territory of Montana with portions of the adjoining territories : showing the gulch or placer diggings actually worked and districts where quartz (gold & silver) lodes have been discovered to January 1st 1865 /

Relief shown by hachures.
Includes inset of "Map showing the routes from the Missouri River to Fort Laramie, where they connect with ... large map."
LC copy annotated in blue pencil: "Working diagram of Montana brought up to Feb. 1, 1871."
Available also through the Library of Congress Web site as a raster image.