Butterfield Overland Mail in Texas
In Texas, the Butterfield Overland Mail service created by Congress on March 3, 1857, was operated until March 30, 1861. The route that was operated extended from San Francisco, California to Los Angeles, then across the Colorado Desert to Fort Yuma, then across New Mexico Territory via, Tucson and Mesilla, New Mexico to Franklin, Texas, midpoint on the route.
Source: Wikipedia — Butterfield Overland Mail in Texas (CC BY-SA 4.0)