Age 16-25 (b. 1785-1794) James Bull had a household in 1810 Knox Co., KY. He appears to have an age 16-25 wife (see notes for her). The marriage of James Bull in ABT 1810 is not among the Bull marriages on Ancestry.com for Kentucky Marriages to 1850 or Tennessee Marriages to 1825, kindly searched for me by Jessie Lee Hutt. Furthermore, there are no Bull marriages in the Early Knox County Marriage 1800-1814 transcription on the county USGenWeb site, but it is said to be incomplete. I also failed to find his marriage in the 1780-1900 KY marriages in "Hunting for Bears" nor on two World Family Tree CDs with KY marriages. Mary Lou Hudson reported the Knox Co. tax lists have James Bull with land in 1810, 1815 and 1816, but not 1817 or later. He was not there in the 1820 census.
Father: John * (parent theory) Bull , Sr. b: ABT 1754
Mother: Unknown b: ABT 1755
Marriage 1 unknown b: 1785 TO 1794