Nice example of Melish's map of the United States, which appeared in the Carey & Lea American Atlas.
The map extends westward to depict the northwest, Missouri and "Arkansa" territories, and the province of Mexico, including Texas. The map draws extensively from Lewis & Clark, Pike, Humboldt and others.
The genesis of this map begins in 1812, with its issuance in pocket map format by Melish. The map was improved, reissued and slightly expanded for a number of works over the next 15 years.