40 x 60 cm. Relief shown by hachures and spot heights. Prime meridians: Greenwich and Washington. Atlas plate numbers 54 and 55 in the upper corners. Shows forts, trails, exploration routes, drainage, mail steamship routes, physical features, Indian tribes, and historic sites. The geographic region of Southwest is referred to as the New Southwest. Original publisher: Johnson .
From the KLVX Steamboats on the Colorado Photograph Collection (PH-00156). "COPY 3921 Reproduction from the Original in the Arizona Historical Society" stamp on verso.