Captain H.D. Wallen's detailed wagon road map extends from Camp Floyd adjacent to Lake Utah all the way to the Cascade Range and Mt. Adams. Locates Fort Boise, Fort Walla Walla, Salt Lake City, Fort Hall, and Fremont's Route in 1843. Topography is shown via hachure with excellent detail along the route. This is the November 9th, 1860 edition drawn by Joseph Dixon of the Topographical Engineers. Accompanied by Wallen's 51-page report. Disbound and housed in archival paper covers with handwritten label.

References: Wheat (TMW) #972.

Condition: B+

The folding map has light toning along the folds, several small splits at the fold junctions, and a binding trim at left that cuts into the border at lower left. Disbound text is clean and bright.