Cannon balls were made at the Durham Furnace and shipped on Durham boats
"Durham boats were “confiscated” by George Washington and used to carry his army across the Delaware River at a spot now known as Washington’s Crossing, PA in order for his troops to surprise the Hessians at Trenton on Christmas Day, 1776."
"A Durham Boat could make the trip from Durham to Philadelphia in one full day. Depending on the size of the boat, it could carry ten to seventeen tons of cargo. The return trip was more arduous as it had to proceed against the current. Much muscle was needed by the boatmen to pole the boat back to Durham."
