This significant untitled map of the United States shows the new borders with Mexico and Canada and identifies army posts, old army posts, land transportation routes, and river/ocean transportation routes. A line from the mouth of the Sabine River in Louisiana north to Lake Superior indicates the "Extreme Limit of Line of Frontier Stations in 1845." Stations to the east of this line were primarily accessible by steamboat and railroads while stations to the west of the line were reached by wagon only. The famous "March of the Rifle Regiment in 1849" from Ft. Leavenworth to the Columbia River is also depicted. Wheat quotes the Cross' original report stating "The accompanying map will show more clearly than any written statement possibly can, the great difference between the country occupied by the troops on the 30th of June, 1845, and at the present time."

References: Wheat (TMW) #727.

Condition: B

Issued folding, now flat, with light offsetting. The map has been professionally backed in archival tissue to repair short fold separations and edge tears, several of which enter the image just past the border. There are also archival repairs to three chips at right, with small loss of the neatline.