Hi Fiona When searching for my Allan family I came across an Alexander Allan and Helen Hendry in Arbuthnott who had eight of a family and the 2nd oldest was a daughter Mary baptised on 29 Aug 1821 at Arbuthnott. Could this be your Mary? It would make her aged 16 years when she married in 1837, this being the minimum age for marrying in Scotland. Full details regarding the other children are available on the LDS site. I would suggest you post an entry asking if anyone can do a look up of the pre 1855 Monumental Inscriptions for Kincardineshire for the death of Mary Fotheringham nee Allan between 1839 and the date of the 1841 census. I assume you failed to find her in the 1841 census? Note - My Allans' turned out to be from Brechin, Angus and I'm not aware of any connection with the above family. Best of luck with your research. Alex. Gray Rutherglen, Scotland.