I feel that I am somewhat familiar with the branch of the tree that involves Thomas&Agnes and Adam&Jane, but I am a bit confused about the part of the Davidson's that you referred to. I think that Thomas & Margaret in Scotland had six children: Adam 1814, Janet 1821, George 1826,John 1826 (could they be twins or sloppy census work?) Thomas 1831, and Agnes 1835. But my question is: Who are the parents of George Alexander Davidson 1857? I think it is Thomas 1831 and a woman also named Agnes??? Could this family have more Agneses, Adams, Thomases and Williams???