1900. 2012-06-29T14:08:07Z. 2017-05-09T13:36:39Z. U.S. Geological Survey. English. Public. Maryland, Washington County (Md.), Allegany County (Md.), West Virginia, Morgan County (W. Va.), Hampshire County (W. Va.), Pennsylvania, Bedford County (Pa.), and Fulton County (Pa.).
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1891. 2011-05-19T19:36:53Z. 2011-05-19T19:42:43Z. U.S. Geological Survey. English. Public. West Virginia, Berkeley County (W. Va.), Hampshire County (W. Va.), Morgan County (W. Va.), Virginia, Frederick County (Va.), Clarke County (Va.), Warren County (Va.), and Shenandoah County (Va.).