English: Photograph of "Hanging Rock" or "Gulph Rock" in Gulph Mills, Pennsylvania circa 1917. Reportedly George Washington marched his men under this rock on his way to winter quarters at Valley Forge, PA.
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Old Roads Out of Philadelphia by John Thomson Faris, JB Lippincott publisher
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{{Information |Description={{en|1=Photograph of "Hanging Rock" or "Gulph Rock" in Gulph Mills, Pennsylvania circa 1917. Reportedly George Washington marched his men under this rock on his way to winter quarters at Valley Forge, PA.}} |Source=Old Roads Out
