George V. Petty - TN

The Humphreys County Heritage Book (1979)has an article on the family of George Valentine Petty and Mary Redden.It says "from the family bible of George Valentine Petty" then lists his children, 11 in all.I descend from his daughter, Lucy Jane.She was born 17 mar 1826 and died 12 July 1867 in navarro Co TX.According to this article she married James Neal Duncan. I know this is true. Where is the Bible?Frances Corcoran gave much of this information.I need to prove Lucy's marriage but it is not recorded in Dickson, Humphreys or Benton Counties.