I wonder if this could be them in 1881 census, mother is listed as Elizabeth Eccles and not Bridget
Dwelling: 83 George Street
Census Place: Govan, Lanark, Scotland
Source: FHL Film 0203689 GRO Ref Volume 646-2 EnumDist 17 Page 27
Marr Age Sex Birthplace
Elizabeth ECCLES M 54 F Ireland
Rel: Head
Occ: Washerwoman
Elizabeth POLLOCK U 16 F Partick, Lanark, Scotland
Rel: Daur
Occ: Paper Staining Mill Girl
Ellen POLLOCK 12 F Partick, Lanark, Scotland
Rel: Daur
Occ: Scholar
Liz