Junction of the Gila and Colorado rivers. Looking up the Gila. 1850. From Rice University http://hdl.handle.net/1911/35861.
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