Striking early General Land Office of the Territory of New Mexico, immediately prior to the creation of Arizona Territory.
The map extends west to the Colorado River and the Salt lake City area, north to include southern Colorado (prior to its formation) and east to northwest Texas.
The map focuses on the topographical features of New Mexico Territory prior to the formation of Arizona Territory, showing towns, forts, Indian reservations and Indian villages, including the Cuchano, Gyano and Mohave Villages along the Colorado River. Indian trails, wagon roads, exploration routes, missions and Indian tribes also shown.
The greatest detail is shown in the Rio Grande River Valley and east to the Pecos River and extending north to Fort Garland, Mountain ranges, rivers and early towns are named.