"In 1751 there was a forge for the conversion of pig-iron into bar-iron at the mouth of the East Valley creek, a... tributary of the ... advertised for sale as the property of Daniel Walker, Stephen Evans, and Joseph Williams. It was then called Mount Joy forge... some years afterward... it came to be known as Valley Forge. The pig-iron used at Valley Forge was hauled from Warwick furnace. In September, 1777, the forge was burned by the British, and in December... the army under Washington was intrenched on the... side of Valley Creek, opposite Valley Forge. General Washington's headquarters were established at the substantial stone-house of Isaac Potts... After the Revolution another Valley Forge was built on the... [other] side of Valley creek; it was in ruins in 1816."