in a really cool old cemetary in Cumberland County. These were probably made locally at The Cumberland Furnace. According to this website: http://www.ettc.net/njarts/details.cfm?ID=1087 Approximately forty bog iron markers can still be found in southern New Jersey. They are located in the Batsto-Pleasant Mills Cemetery; Weymouth Methodist Cemetery; Mt. Pleasant Cemetery, Millville; Cumberland Methodist Cemetery, Millville; Springfield Meeting House cemetery; and a cemetery in Hammonton now covered by a farmer's field. There is a single bog iron marker in Palermo. The largest number (over twenty) can be found in Cumberland Methodist Cemetery in Millville.
Bog iron markers were a byproduct of the bog iron industry that flourished in the Pine Barrens in the late 1700s and early 1800s. They were manufactured at Cumberland, Weymouth, and either Atsion and/or Batsto Furnaces, probably using left-over bog iron at the end of the day. Many of the existing markers do not have inscriptions.