My gg grandmother was Sarah Priscilla Mankin b. 4-25-1840 TNd. 4-23-1910 Boone Co., AR m. Presley Boyd Reed Tucker in 1869 in AR. I have her father as Stephen B. Mankin b. 1817 in TN and mother Sarah Robertson b. 1815 TN.Is this the same person as your Stephen Bennett Mankin Sr.?I know very little about this family other than supposedly there was some native american background somewhere.Would appreciate any help.