Raised on the farm, Henry Wynkoop was subsequently admitted to Princeton University, but opted not to complete his studies, choosing instead to enter into local politics.

[2] As a farm owner in Pennsylvania, Wynkoop benefitted financially from the practice of chattel slavery, as his father did before him.

During his later years, Wynkoop created a will in which he decreed that, upon his death, the people he had been enslaving should be freed by manumission, a process which finally occurred on March 25, 1816, when he died in Bucks County.

[4][5] Following his death, Wynkoop was interred in the graveyard of the Low Dutch Reformed Church in Richboro, Pennsylvania.

Mrs. Geyer was the author of the 1976 history for the Bucks County Historical Journal (Fall 1976 Edition) celebrating Northampton Township's 250th anniversary.