Caleb Stillson Hammond (1862 - 1929)was the founder of C. S. Hammond & Company, a map making and printing firm based in Brooklyn, New York. Hammond started his career in mapmaking as the head of Rand McNally's offices in New York City, where he began working in 1894. Hammond split with Rand McNally, forming his own printing concern in Brooklyn, New York, in 1900. The firm was subsequently incorporated in 1901 and relocated to Manhattan, and then to Maplewood, New Jersey, near Hammond's family home. Hammond rose to become one of the largest cartographic publishers in the United States, second only to Rand McNally in volume. On his retirement, C. S. Hammond passed the firm to his son, who subsequently passed it to his own son, C. D. Hammond, who sold the company to Langenscheidt Publishers in 1999. The firm has since been folded into Universal Map, an affiliate of Kappa Publishing Group. This archives of the Hammond World Atlas Corporation, an invaluable resource, where donated to the Library of Congress in 2002.