Relief shown by shading and spot heights.; "Compiled from plane-table surveys by David G. Thompson ... Relief shading by John H. Renshawe."; "Watering-place survey by David G. Thompson. Surveyed in 1917-1920."; Plates IX-XIII from the U.S. Geological Survey Water-supply paper 490. on sheets 96 x 45 centimeters, or smaller + Scale 1:250,000 General Map Collection