Debs,
I've just found a possible wife for Alexander Gibson. Janet Jean Gibson born 7 Nov 1788 and baptised 28 Dec 1789 in Falkirk. Her parents were George Gibson and Marianne Manson. See LDS Batch No.C119701. Her death age could have been reckoned from her baptism date but death certs are notoriously unreliable as sources anyway. Her baptism record from ScotlandsPeople Ref.479/50/9 does not give her father's occupation. It only mentions that the birth was lawful. However, the vast majority of my Gibson ancestors were hawkers.
Janet had five siblings, William 1790, Jean Swinton 1792, Agnes Scarth 1794 George 1795 and Thomas 1801, all born in Falkirk.
I can still find no reference to my Janet Gibson, born 1806, being part of this family. Her baptism entry 479/50/382 has her father as Thomas Gibson, Grammar School, Falkirk and her mother as Anne Reid. The very next entry is for her sister Mary Anne who was born 27 Sep 1807 in Forfar and baptised two weeks later in Falkirk. So, now I have to research the Grammar School thing!
Hope you can make use of all this.
Jack