May be a wild goose chase but on 1891 Census there's a Thomas Read b 1841 Cook birthplace Not known with wife Mary b 1851 Fleetwood, Lancs., and son Robert b 1876 Fleetwood all residing 273 City Road, Hulme, Manchester RG12 3194 folio 94 p.22. There are several Margarets b 1879 elsewhere - including one shown as Sister (scholar) to head of house Robert Reid (single) age 23 b.Glasgow with several other 'brothers and sisters'. Maybe it's stretching things too far but Margaret could have been away from parents' home and the 'Mary' above could have taken that name if she didn't like Ellen; Mary Ellen was quite popular then I think. Hope I haven't put you off track.