Could you find out any other info at all? I have a Maryann BORN 1849 who doesn't seem to belong to anyone at the moment. I know she was born Maryann or Mary Ann Maginn in Ireland[I don't know the County -the 1881 and 1891 Census only stated Ireland as the place of birth] could give you more recent details if connected. Nearest known living in the South of England [your region-ish 1881 Census, Bath, Somerset- British Army wife].Then Lincoln Old Barracks,Burton Road, Lincoln. Hope this rings some bells.