Weber, Edward (Lithographer)Illustrative map of Allegany and Washington counties,1840. Includes a geological profile of the Cumberland and National roads. 46 x 20.1 cm; 1 images; monochromeJPEG95407179-29ac-49db-b2a1-31025b99744fengPublicMap illustrative of Allegany and Washington countiesMapsPennsylvania--Allegheny CountyMaryland--Washington CountyWest Virginia--Allegheny Mountains1840University of Maryland