Unfortunately, I have NO other specific information about this particular James PORTER. I pulled a copy of his Will during my research concerning James PORTER (d bef 2 Mar 1775), of West Nantmeal Township, Chester County, PA, and Nathaniel PORTER (b 1737, d 21 Sep 1818 - Washington, PA).
As explained in my reply to Arlene Gemmell's Post ["James PORTER (b ca 1776-1794, d bef June 28, 1824 - Washington, PA)"], this MIGHT have been a son of William PORTER and grandson of James PORTER, of Chester County, PA.
But it is also unclear to me whether this James PORTER with a brother named Nathaniel PORTER is the James PORTER whose Will I posted or another James PORTER who died in February 1825.