U.S. Geological Survey, George Otis Smith, Director; R.B. Marshall, Chief Geographer; Sledge Tatum, Geographer in charge; topography by A.P. Meade, Jr., and F.H. Nelson ; control by C.F. Urquhart and C.H. Semper. Relief shown by contours and spot heights. "Surveyed in 1910. Engraved Aug. 1911 by U.S.G.S. Edition of Sept. 1911. Approximate mean declination 1910. Includes, in margin, map showing areas of authorship. Text on verso.