Ephraim Prescott was my Great-great-great-great-great grandfather. Several years ago Dan Prescott, great-great grandson of Ephraim Prescott. published a book entitled "A Prescott Path" which has information on Ephraim and his descendants. According to the book Ephraim was born around 1745 and died in 1819. Ephraim lived in Edgefield, South Carolina and served in the Revolutionary War.
It is believed that Ephraim came to the United States as an indentured servant prior to his severice in the Revolutionary Ware.
I do not have a copy of Dan's book but he has sent he excerts from it.
I'm not sure if Dan is doing research; however, you can try to contact him @firstname.lastname@example.org
. I'm sure he'll be very willing to share any information he has.
I will happily share any information i have.