one of the oldest parcel maps documenting the tract where the fort stood is dated november 23, 1762 and was obtained through the hamilton library collection in carlisle; unfortunately, the fort location is not indicated. next we have surveyor general armstrong's survey map of the parcel apparently dated 1761; this, was obtained at the local engineering office and it does show a location for the fort. the map indicates that the parcel that includes the fort was deeded to jeremiah warder and company in right of george croghan. this map was later redrawn for a plate published by africa (1883, 342a).