Donna, we may be on the right track. According to what little info I have, Margaret was born in 1835 in Williamson Co. She could be the 1 female age 0-5 on Thomas Lock's census. Was Thomas Lock not listed on the 1850 census? Thomas could have died between 1840 and 1850 leaving a widow with children. Are there any other Locke's listed in 1850, they could have been brothers. A neat mystery, huh? Thanks, Judy