Texas [and] Map of the Californias by T.J. Farnham.

An excellent and uncommon mid-19th-century map of the Republic of Texas and Mexican California.

Published in 1845 for his Cerographic Atlas of the United States, this sheet is a prime example of Sidney Morse’s pioneering wax engraving process. This innovative printing technique, developed by the brother of telegraph inventor Samuel Morse, allowed for the mass production of maps with sharp, intricate detail at a significantly lower cost than traditional copperplate engraving. The resulting manufacturing technique and clean aesthetic became a hallmark of 19th-century American educational cartography.

The map captures a definitive moment in American expansion, featuring the Republic of Texas on one side and Upper California on the reverse. Issued the same year as Texas’s annexation, the Texas side illustrates the ‘Young Republic’ at the end of its life, with its massive territorial claims reaching as far north as the 42nd parallel. The image provides a visual record of the region’s transition to statehood, identifying early counties and settlements just before the outbreak of the Mexican-American War.

On the reverse, the map of The Californias (Upper and Lower) provides a rare, pre-Gold Rush look at the territory while it remained under Mexican sovereignty. Because it predates the major surveying expeditions of the late 1840s, the map reflects the era’s speculative geography, focusing on the coastline and river valleys while leaving the Great Basin largely vague.The cartography is heavily influenced by the voyage of Thomas Jefferson Farnham, duly credited in the title.