According to a message I received today Francis McManus b.1827 in Dublin and my ancestor, very possibly married a certain "Margaret Armour in Sorn 15 Sptember 1851 and had a daughter Mary born abot 1852 in Sorn. Scotland"
According to my current info Margaret's birthdate should be around 1829 in Ireland. Also they had 3 children, the first one being named Mary, the second Bridget and the third Joseph (my ancestor).
For Mary I currently have two different years of birth given, 1847 (in Rhode Island, USA, US Census 1850) or 1852 (in Sorn, Scotland, above).
We are still checking the sources for this info. The McManus's originate in Fermanagh though they moved to Antrim and lived in Dublin at the time. The Armour family exsists both in Fermanagh and in Argyle, Scotland.