My gggrandfather was Robert Thomas Adair born around 1841/2 at Glencha, Culdaff, Donegal. He served in the Royal Artillery. He married Mary Anne Elliott at Kilrush, Co Clare.They settled in Hampshire, England.(curiously the 1881 and 1891 censuses say he came from Scotland?) I am keen to find out where his father was born, who he married, other children, etc. His father was John Adair, a schoolmaster including apparently in Belfast in the 1820s. I imagine he must have come from Northern Ireland or Scotland. Grateful for any help.