This interesting map covers the country from about the 49th to the 45th parallel, so the Columbia River is shown as far up as the confluence with Clark's Fort. The Snake River is shown only as far as Lewiston, but Clark's Fork is shown in its entirety, as are Flathead River and Lake. The map provides great detail of the mining districts, numerous wagon roads, Indian Reservations, battlefields, forts, etc. This is the general map drawn by Freyhold for Captain John Mullan's important report, which appeared (and was part of the lobbying effort) during the congressional debates that resulted in the establishment of Idaho Territory.
References: Wheat (TMW) #1080; Wagner-Camp #393.
Issued folding with light toning along the folds, a few unobtrusive pen marks, and a 3" fold separation at left that has been closed on verso with archival tape. A 2" binding tear at left has also been closed on verso with archival tape.