I am also looking for info regarding James Fullerton and I am a direct decendant of his. I work in Philadelphia, so I was able to run to the cemetery during my lunch to try to find his gravestone. No luck! He either did not have one or the map changed.
I am really interested to find info on his father. There appears to be no info on him. The rumor in our family is that James' father was American Indian.
Good luck on your search! Feel free to check out my tree. I added some info recently about James.