William Hemsley Emory (September 7, 1811 - December 1, 1887) was an American surveyor, civil engineer, and Army officer. Born in Queen Anne's County, Maryland, Emory graduated from the United States Military Academy at West Point in 1831, was assigned to the Fourth Artillery, and resigned from service in 1836 to pursue civil engineering. He returned to the army in 1838 to serve in the newly-formed Army Corps of Topographical Engineers. During the Mexican-American War, Emory served in the Army of the West under the command command of Stephen Watts Kearny. While serving with Kearny, he kept a detailed journal that was then published as Notes of a Military Reconnaissance from Fort Leavenworth to San Diego and soon became an important guidebook for the route to Southern California. After the war, Emory served as part of the team that surveyed the United States-Mexican border. When the American Civil War started, Emory was stationed in Indian Territory and immediately realized the likelihood that Confederates would capture him and his men. To avoid this, Emory quickly secured the services of Black Beaver, the famous Lenape warrior, to guide them out of the territory. Emory and his troops, on their way from Fort Washita to Fort Leavenworth, captured a number of their Confederate pursuers, which were the first prisoners taken during the war. Emory then served in the Army of the Potomac, in the Western Theater, and in the Shenandoah Valley Campaign of 1854. After the war, Emory held the post of commander of the Department of the Gulf during Reconstruction and, in September 1874, President Ulysses S. Grant ordered Emory to New Orleans, where he successfully negotiated a peace with the white supremacist paramilitary organization the White League, which led to the White League being disbanded. Emory married Matilda Wilkins Bache on May 29, 1838 in Philadelphia, with whom he had two sons, both of which served in the United States armed forces. Matilda Bache was Alexander D. Bache's sister. Alexander Bache was one of the most influential superintendents of the United States Coast Survey. More by this mapmaker...

Augustus Theodore Frederick Köllner (1812 - December 10, 1906) was an artist, engraver, and lithographer based in Philadelphia. Born in Wurttemberg, Germany, Köllner began his career in Germany, working as a book illustrator in Stuttgart and Paris in the late 1820s and 1830s before immigrating to the United States in 1839. After settling in Washington, D.C., Köllner worked as a lithographer for the Haas firm, working on advertisements, bank notes, and city views. He moved to Philadelphia in 1840 and tried unsuccessfully to establish himself as a portrait painter. After this misstep, Köllner became the second chief artist of P.S. Duval and William Huddy's 'U.S. Military Magazine' (1839 - 1842). Throughout the 1840s, Köllner worked as a lithographer for many different Philadelphia based lithographic firms, including Duval, J.T. Bowen, Frederick Kuhl, Thomas Sinclair, and Wagner and McGuigan. Between 1847 and 1848, Köllner began working for the lithographic firm Brechemin and Camp, for whom he designed all genres of lithographs and advertised his own lithographic views based on his annual summer sketching trips along the East Coast. His work also began to be published in the seminal series 'View of American Cities', published between 1848 and 1851 by Goupil, Vibert, and Company. While working for Brechemin and Camp, Köllner was responsible for creating the multi-foot Dripp's map of New York City. Kollner established his own firm in 1851 and worked on a wide range of projects, including advertisements, labels, city and landscape views, and maps. During the Civil War, Köllner enlisted in the cavalry in 1863 and later sold photographic reproductions of the etchings he did as a soldier. He produced his last series of landscape lithographs entitled 'Bits of Nature' in 1878, but focused mostly on his watercolor work during the late 1870s. Köllner retired in the early 1880s, but continued to make sketching trips around the Philadelphia area. Köllner married Mary Sheek (c. 1821 - 1899) in 1843, and they had several children, three of which survived infancy: William, Clara, and Josephine. Köllner died on December 10, 1906. Learn More...