First state of Henry Schenk Tanner's map of America from is American Atlas.
The map shows South America in the midst of its revolutionary period, during which time the former Spanish and Portuguese colonies fought for and attained their independence.
Tanner commenced production of his most ambitious project, his American Atlas, in 1818. Released in 5 folios between 1819 and 1823, the Atlas is widely regarded as the single most beautiful large scale American Atlas ever published. The maps are large, detailed and elegantly engraved. The production resulted in the split of Tanner from his partners Kearney & Vallance, but resulted in the greatest of American Atlases.