First state of Thomas Cowperthwait's map of the US, showing some of the most unusual US Territorial configurations. Oregon Territory still runs from California to Canada and the Rocky Mountains, immediately prior to creation of Washington Territory. Large New Mexico and Utah Territories appear for the first time, having just been established as territories in 1850. A strange notch incorporates Middle Park in Colorado into Utah. Massive Missouri or Northwest Territory predates Nebraska Territory and Indian Territory is in its largest and must unusual configuration. Texas is filled with early roads, including Road from Ft. Smith to Dona Ana made b y General Arbuckle. The Great Spanish Trail to Salt Lake is shown, as is Fremont's route. Lewis & Clark's route is noted. Many Indian Tribes and early Western Forts. Large inset of the gold region in the year following the discovery of gold in California. A nice exmaple of this rarely seen map.