Map of district north of Washington D.C. : made in 1859-60 by H.L. Abbot and F.W. Vaughan.

Shows "Courses and triangulation by pocket compass. Distances by counting steps." Does not show survey points.
Covers area in N.W. quadrant bounded by Rock Creek, Rock Creek Ford Rd., Rock Creek Church Rd., 7th St. Pike (Georgia Av.), and Boundary St. (Florida Av.).
Relief shown by hachures.
Hachures shown as if from 1860 map, but names made by typewriter.
Includes note: Red lines indicate tracks followed.
Available also through the Library of Congress Web site as a raster image.
DCP