1 map ; 18 x 25 cm., folded to 27 x 14 cm.
Forts and trails of the Old West map.
Relief shown by hachures. Shows routes of early trails and explorations: Oregon Trail, Santa Fe Trail, California Trail, Old Spanish Trail, Smith-Fitzpatrick Route 1823-24; Fremont-Fitzpatrick Route 1843-4; Albert-Fitzpatrick Route 1845.