If this is the right one then in 1871 she was with her family at 16 Gaylor Street Manchester
Charlotte L Marshall abt 1859 Manchester, Lancashire, England Daughter Manchester Lancashire
Elizabeth F Marshall abt 1867 Manchester, Lancashire, England Daughter Manchester Lancashire
Henry Marshall abt 1832 Manchester, Lancashire, England Head Manchester Lancashire
John Henry Marshall abt 1865 Manchester, Lancashire, England Son Manchester Lancashire
Mary Ann Marshall abt 1838 Nottinghamshire, England Wife Manchester Lancashire
Mary E Marshall abt 1869 Manchester, Lancashire, England Daughter Manchester Lancashire
Sarah Ann Marshall abt 1862 Manchester, Lancashire, England Daughter Manchester Lancashire
and in 1881 they were still there
Annie Marshall abt 1873 Manchestr Daughter 16 Gaylor St, Manchester, Lancashire, England
Bertha Marshall abt 1876 Manchestr Daughter 16 Gaylor St, Manchester, Lancashire, England
Edith Marshall abt 1876 Manchestr Daughter 16 Gaylor St, Manchester, Lancashire, England
Elizabeth Marshall abt 1868 Manchester Daughter 16 Gaylor St, Manchester, Lancashire, England
Henry Marshall abt 1831 Manchester Head 16 Gaylor St, Manchester, Lancashire, England
Henry Marshall abt 1866 Manchester Son 16 Gaylor St, Manchester, Lancashire, England
Mary A. Marshall abt 1838 Nottinghamshire, England Wife 16 Gaylor St, Manchester, Lancashire, England
Mary E. Marshall abt 1870 Manchester Daughter 16 Gaylor St, Manchester, Lancashire, England
Sarah A. Marshall abt 1863 Manchester Daughter 16 Gaylor St, Manchester, Lancashire, England
William Marshall abt 1880 Manchestr Son 16 Gaylor St, Manchester, Lancashire, England
Then there is the Sarah who is with the Skelmerdine family - it is possible for her to have been recorded at both addresses if she happened to be at work when then enumerator called there and then at home when one called there. If you had more details of her family you could confirm this.
Gillj