Thanks, Ilva. I have the Revolutionary War info from the National Archives and I'm hoping to visit the area where the Harrisons lived in Overton/Pickett/Clinton counties. If in fact the cemetery is under water, I guess I'll have to take my scuba gear. Drat!
I haven't found James Mason Harrison's parents and your suggestions are new ones for me to trace. Thanks for the information.
Good luck on making the connection in your line. Martha