Scale ca. 1:320,000. Hand colored. Relief shown pictorially. Indexed for points of interest. Insets with indexes: Plan of Boston and its environs, 1775.--A view of the lines thrown up on Boston Neck; by the ministerial army. LC Maps of North America, 1750-1789, 880 Available also through the Library of Congress Web site as a raster image. col. map 37 x 44 cm.