csc,
You are finding a lot of Alexanders that I havn't found where are you getting them from?
Our Alexander had two daughters with Helen McKellar,
Helen Grierson and Sophia Grierson, both migrated to Australia in the 1850's and 60's. I have all their details from that time on. Helen was my g.grandmother.
Because of his age at the time of his marriage to Helen McKella, it is possible that he had a previous marriager.
One of the problems is his age, since he was 88 at the time of the 1851 census, ( the first one to give birth place) if he had siblings born at Wigton they could very well have died, or they may have emmigrated to America, Australia or Ireland.
Wyanga