Thanks Ian, Since i posted my query I have made some progress and think I have the father and siblings of Alexander. I had Alexander's date of birth wrong,he was actually born in 1756. So I now have his correct details,birth and death.However I can't find his marriage.According to the NE Scotland fhs some pages are missing from the OPR's, unfortunately for the dates of a likely marriage for him and Jean/Jane Dickie. As he was a Crofter/Farmer he must have paid rent to someone,so I'm hoping to get more information on him by pursuing this line.
Thanks again for your input and advice,it's nice to know that someone has read my post