There are tar kiln dripping pans near tributary heads all along the Manumuskin. The pair at Cedar Branch, tributary of the Manumuskin, are just above the intersection of Mattox Road and the trail to Canute Neck or Parsontown below Bennetts Mill. The "runnels" identified by Bob are in the right place for pitch gutters used to fill 32-gallon barrels (320 pound) barrels to be punted to a boat- or shipyard for distillation. Tar kilns are often repurposed as charcoal pits, although there is a record of pine tar cordial being made along the Manumuskin up to the start of the twentieth century. Mattox Road connected Walkers Forge (where Mattox had an interest in the Richard Somers sawmill) with Cumberland Furnace. Mattox Landing is the old name for Mauricetown further down the Maurice River. A Mattox also ran the Blue Anchor Tavern. A Blue Anchor (Mattox; =Union) Road meets up with the above mentioned Canute Neck trail at Parson's house in Parsontown, linking the Blue Anchor Tavern via Inskeeps Ford. The Manumuskin kilns are working by the mid eighteenth century, run by Swedes, Finns, and Dutch—e.g., Hans or Hance of Hance's Great Bridge. Hans or Hance may be Hance Steelman, but so far his surname remains a mystery. I'm busy writing papers and a book on the ice age landscape but will be back soon.
I can't thank Boyd enough for the handy maps. He has done much to advance our understanding of Pinelands geography. Well done!
Spung-man