Woodcuts. Monument marking the border between the United Stated and Mexico, located at Latitude north: 32° 31′ 59″ 58′; Longitude: 7h 48′ 21″ 01 west from Greenwich.
Monument at Initial Point, Pacific. 1850. From Rice University http://hdl.handle.net/1911/35917.
Image taken from larger work: "Personal narrative of explorations and incidents in Texas, New Mexico, California, Sonora, and Chihuahua, volume 2: Connected with the United States and Mexican Boundary Commission, during the years 1850, '51, '52 and '53" http://hdl.handle.net/1911/27279