Sounds like you are making some headway. The person tested would have been a GGGG Grandson of Joseph and Ann Biles/Bawls Harrison. The first 12 markers were matched 12 for 12 to the Isaiah Harrison Group. We are still waiting for the rest of the markers to come in. The Stewarts married into our line of Harrisons on many occasions. Keep me posted. You may email me at steelemagnolia@gmail.com.
Thanks
Brenda Harrison Steele