According to the IGI, there were 9 Alexander Mansons born in Caithness between 1763 and 1774 (I searched 1768 + or - 5 years). I have tentatively settled on one christened 2 Mar 1766.
Alexander is my 4th grt grandfather, and he moved to Pitsligo, Aberdeen, and married in 1793. I'd like to take this back another generation. I trust that his birth in Caithness is correct because it was deduced (50+ years ago) by a first cousin who was a well-respected Scottish statistician who worked at the General Register Office in Edinburgh.
Based on the names of Alexander's children, I have concluded that his most likely parents are William Manson and Margaret Duncan of Thurso. Unfortunately, there seems to be a large gap in the IGI for marriages in the time frame for Alexander's birth.
Any ideas as to where I go from here?
For additional info, here are all the offspring for Alex. that I found in Pitsligo (dates are when christened):
William 16Jun1795 Male 18Apr1796 Jean 14Jul1798 Alex. 8May1800 John 17Apr1802 Margt. 25Apr1804 Christian(f) 16May1806 *William 17May1808 <--- my direct Ann Smith 23 JUL 1811