My name is Larry Carter and Mary W. Allen is my Great-Great Grandmother as well. Mary's first husband was William Hamilton Carter who died when he was 26. He and Mary had two children, Elizabeth and William Sebastian. Our branch of the Carter's is through William Sebastian. William Hamilton died 4 months before he was born. He died on Nov. 3, 1852. Mary, his wife, married John Johnson in 1860, moved to Illinois, and had several children. The youngest, John Quincy Johnson, was a close uncle to my Dad in Dawson, Illinois. My Dad is John M. Carter, Sr. As far as David B. Allen is concerned, his father is Thomas Allen who also lived in Boone county, KY. He had two sons with Sybella, William and David B. Just recently I found the property they owned that fronted the Ohio River. David B. Allen moved to Missouri in the late 1840's where Mary W. met William Hamilton. They were married, if I remember correctly, in 1849. I have found the property they owned in Missouri and am planning a trip there sometime later this summer. I'll look forward to hearing from you.