1079248 Map of the City of New York showing the Location of Small Pox, from May 1st 1874 to April 30th 1875., 1874-75 (black ink on paper) by American School, (19th century); Collection of the New-York Historical Society, USA; (add.info.: Map of the City of New York showing the Location of Small Pox, from May 1st 1874 to April 30th 1875. Made under the direction of W. De F. Day, M.D., Sanitary Superintendent, Health Department. No. of cases of small-pox 2499; foldout from New York City Board of Health, Annual Report, 1874-75 (New York: 1876) W.B. Fernhead, del.); 穢 New York Historical Society ; American, out of copyright.