Pennsylvania civilians digging of earthworks on Hummel Heights ID: 76 | This file appears in: Men of Muscle Illustration of the fortification process at Hummel Heights (Fort Couch). | Source: ExplorePAHistory.com | Rights: Rick Sauers Download Original File SourceExplorePAHistory.comRightsRick Sauers "Pennsylvania civilians digging of earthworks on Hummel Heights" appears in: Men of Muscle