Scale ca. 1:26,400. Manuscript, pen-and-ink and watercolor. Title from manuscript label on verso as originally mounted. Relief shown by shading. Shows fortifications, troop encampments, and roads from "White Marsh," "Frederick Town," and "Spuriens." LC Maps of North America, 1750-1789, 1419 Available also through the Library of Congress Web site as a raster image. col. map 25 x 34 cm.