Calvert County

1902 Map of Calvert County Showing the Topography and Election Districts. Baltimore: Maryland Geological Survey, 1902. 70 x 102 cm.

1910 Prince Frederick Quadrangle, 1904-05. U.S. Geological Survey, 1910. 42 x 51 cm.

1938 Prince Frederick Quadrangle, 1934-35. U.S. Geological Survey, 1938. 42 x 51 cm.

Carroll County

1894 Ellicott Sheet, 1890. U.S. Geological Survey, 1894. Reprinted, 1904. 42 x 51 cm

1909 Mt. Airy Quadrangle, 1906-07.  U.S. Geological Survey, 1909. Reprinted, 1925. 42 x 51 cm.

1909 Map of Westminister and Vicinity.  Maryland Geological Survey, 1909. 61 x 51 cm.