1832 Plan or Map of Westchester County, New York

This is a rare map of Westchester County, New York, the Bronx, and upper Manhattan during the American Revolutionary War issued for John Marshall's 1832 edition of the Life of Washington. The map covers the strategically important region north of New York City as far as the Croton River and Tellers Point (Croton Point). Various rivers, roads, and topographical elements are noted. Color coding indicates the positions of the British (Red) and Continental (Blue) forces as each attempted to maintain control of the region.

Marshall prepared this map to illustrate the Battle of White Plains. In 1776 the British General William Howe, fleeing Boston, regrouped and landed his forces on Long Island and Staten Island. After defeating George Washington at the Battle of Long Island, Howe sized control of New York City and most of Manhattan. After a series of skirmishes leading up to the Battle of Harlem Heights, Washington and his forces retreated northward to Westchester County. Howe, keen to size the advantage, landed troops in Westchester, a flanking maneuver intending to encircle Washington's forces. Washington, alerted to the tactic entrenched himself in White Plains, but was unable to hold against Howe's superior numbers. Howe proceeded to drive Washington across New Jersey into Pennsylvania where he famously crossed the Delaware on December 26th to surprise a Brigade of Hessian mercenaries in the Battle of Trenton – a strategic Continental victory and major turning point in the war.

This map appeared in atlas volume attached to the 1832 edition of John Marshall's seminal work, The Life of Washington. Marshall composed the five volume biography between 1805 and 1807 and based the work on original papers and records provided by the president's own family. The earliest partial edition of the The Life of Washington appeared in 1824 as A History of the American Colonies. In 1832 Marshall revised and abridged the original voluminous work to just two volumes and some 400 pages – from which this map was extracted. The maps of the 1832 edition are notable and desirable in that, unlike the original edition, most had hand applied color work.