This is the late 1863 - early 1864 edition in this series of maps. Arizona still has the county configurations of the old New Mexico Territory, with the addition of Castle Dome and Ewell counties in the south. The Utah/Nevada border is now at 115°. This is a completely new plate with much changed in watershed and mountain detail with several of the earlier notations removed. Details the U.S. Mail routes, the Emigrant roads to California, the proposed railroad route through Utah, Nevada and California, and the Pony Express trail.

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Condition: B

The map has light overall toning and scattered foxing. There are a couple short, mostly marginal tears in the bottom, with one just entering the map that has been repaired with archival tape. The centerfold has a few small stains and has been reinforced on the verso with archival tape.