That's interesting.I had always assumed that David and Stephen were close because they were close in age.Maybe it was that David was the oldest and he felt a responsibility (he would have been about 18 when his father John died in early 1804) towards Stephen as the youngest.
Is Peggy Gough shown in the 1850 Georgia census with David?That would make David about 40 years old when he married Peggy Gough.How old is Peggy listed?Do you have a date of death for David?
Here's my Knowles line: Me (1948) Mary Knowles Henderson 1921/2005 Wiley Bryant Knowles (1899-1962) Bryant Breckinridge Knowles (1862-1947) David J Knowles (1832 - 1906) Stephen Knowles (~1800 - ??) John Knowles (before about 1740 - 1804) (Probably) Robart Knowles (~1700 - 1762)