Bernard Ratzer, a Lieutenant in the Royal Artillery, prepared a survey of New Jersey in 1769 to assist the Boundary Commission in settling a long standing boundary dispute between the states of New York and New Jersey. London mapmaker William Faden published Ratzer's survey as a finished map in 1777 in his North American Atlas. Published during the American Revolution, the map depicts the area known to George Washington before the Battle of Monmouth, and shows the fortification at Valley Forge. Despite having several errors of location, the map is finely executed, and contains an elaborate cartouche of a farmhouse with landscape in the upper left corner. Displayed here is the first English edition of the map. A French derivative of this map by Georges-Louis LeRouge may be viewed online at: http://maps.bpl.org/id/rb15252.