The sign reads:
"Shippen Manor 1754
Built by Joseph and Wm. Shippen, owners of Oxford Furnace. Served as Iron Company Residence for 200 years." [1]
The Oxford Furnace produced two tons of pig iron a day during the Revolution, which was made in musket balls, cannons, cannonballs, grapeshot and tools. [2]
Sources:
1.^ Warren County Cultural and Heritage Commission sign.
2.^ Mark Di Ionno A Guide To New Jersey's Revolutionary War Trail ( New Brunswick: Rutgers University Press, 2000) p.195