Your post on Jacob Markley caught my eye as I have a 6th Great Grandfather, Jacob Markley. I looked in our family record and found that my Jacob may be an uncle to the Jacob you have in your post. My Jacob was born in Germany 7-11-1701, died 8-29-1784. he spent all of his adult life in Perkiomen and Skippack townships of Philadelphia county, later Montgomery county. I come thru his daughter Rebecca, b. 1734 who married Frederick Isett. What I found very interesting is that Rebecca's younger sister Christina, b. 5-27-1736 Married a Col. William Antes of Frederick township Philadelphia county. Could this be William Antes the gunmaker? The book, Moravian Gun Making of the American Revolution, gives a short side bar history of William Antes, 1731-1810, where it states that he was an ardent patriot living in Philadelphia county in 1777 and appointed a member of the Council of Safety.
Thanks, Mark Poley