Whitemarsh. Here in the Emlen House Washington had headquarters, Nov. 2 - Dec. 11, 1777, just before moving to Valley Forge. Last battle of the year was a British attack repulsed here Dec. 5-6. SR 2027 (Pennsylvania Ave.) just E of Pa. 309, Fort Washington, PA by Pennsylvania Historical and Museum Commission Colour: blue Wikimedia: Flickr: Google Streetview OpenStreetMap