Now have 1930 census. David is living with his son George Ivy. David's age is given as 78; clearly not a match with all other censuses. Notice, though, that David is shown as being born in MS, with both father and mother also born in MS. All this is wrong, so information given to census taker was provided by someone who obviously didn't know David's vital information very well. This was not uncommon for censuses. Census takers could get information from most anyone and age accuracy suffered as a result. I would discount this age (78) as it doesn't match with either the other censuses or his gravestone. I will stick with 1856.