Samuel Augustus Mitchell (March 20, 1792 - December 20, 1868) began his map publishing career in the early 1830s. Mitchell was born in Bristol, Connecticut. He relocated to Philadelphia in 1821. Having worked as a school teacher and a geographical writer, Mitchell was frustrated with the low quality and inaccuracy of school texts of the period. His first maps were an attempt to rectify this problem. In the next 20 years Mitchell would become the most prominent American map publisher of the mid-19th century. Mitchell worked with prominent engravers J. H. Young, H. S. Tanner, and H. N. Burroughs before attaining the full copyright on his maps in 1847. In 1849 Mitchell either partnered with or sold his plates to Thomas, Cowperthwait and Company who continued to publish the Mitchell's Universal Atlas. By about 1856 most of the Mitchell plates and copyrights were acquired by Charles Desilver who continued to publish the maps, many with modified borders and color schemes, until Mitchell's son, Samuel Augustus Mitchell Junior, entered the picture. In 1859, S.A. Mitchell Jr. purchased most of the plates back from Desilver and introduced his own floral motif border. From 1860 on, he published his own editions of the New General Atlas. The younger Mitchell became as prominent as his father, publishing maps and atlases until 1887, when most of the copyrights were again sold and the Mitchell firm closed its doors for the final time. More by this mapmaker...

Henry Schenck Tanner (1786 - May 18, 1858) was one of the preeminent American map engravers and publishers of the early 19th century - what is considered to be the "Golden Age of American Map Publishing". Born in New York City but based in Philadelphia, Tanner's forty plus year career was almost entirely focused on cartographic work. His earliest map work appears in conjunction with another important map publisher, John Melish. Early in his career, Tanner partnered with his brother Benjamin, to engrave extensively for Melish as well as other Philadelphia publishers including Lucas Fielding (Baltimore), A. Bourne, Jason Torey, Samuel Harrison, and Samuel Lewis, among others. In 1818 Tanner convinced his fellow publishers and partners to finance the compilation of a New American Atlas. The atlas was sold by subscription and slowly emerged between 1819 and 1823. The New American Atlas, possibly the pinnacle of 19th century American cartography and was commended in its day as "one of the most splendid works of the kind ever executed in this country". It was subsequently republished in several updated editions until about 1839. Tanner had by this time become the most active and influential map publisher in the United States. Around 1832, recognizing the market for a less cost prohibitive atlas, Tanner began work on the smaller format New Universal Atlas. This popular and important atlas went through numerous editions before being bought out by Carey and Hart, and then, in 1846, by S. A. Mitchell, who would rise to become the preeminent publisher of the next generation. In addition to these important atlases, Tanner also issued numerous extremely important and influential travelers guides, state maps, wall maps, and pocket maps. He should not be confused with his brother, also an America map engraver, the New Yorker Benjamin Tanner. Learn More...