You are right on all Until you get to Buck. Buck was actually Roosevelt Abercrombie a Grandson Of James through his second wife Martha Herrin. Roosevelt was born in 1913 and died in 1986. He described there relationship with the Sims as very close. He even described as cousins. All this leaves me to believe that Colvill was a son of John, just as my William was. William and his family followed the exact same route. They went from Lautens to Jackson County, Georgia to Fayette and Henry County , Georgia and on to Chambers County, Alabama.