I hope to be able to confirm when R-S7019 snp mutated. As I stated in the background, I know my 12th great-grandfather John Wells, b. c. 1492 carried R-S7019 but we do not know which one of his ancestors started the mutation? More Big Y testing of "Wells" men who share common ancestry on the "Wells" tree, see link "30 Generations of Wells, 2nd edition" on background page.