These is a reasonable chance that this is your emma in the 1871.
Should narrow the area down a bit.
Agnes Parrett 12 Benenden, Kent, England Daughter
Amy Parrett 18 Benenden, Kent, England Daughter
Ellen Parrett 20 Cranbrook, Kent, England Daughter
Emma Parrett 51 Cranbrook, KentEngland Wife
Mary A Parrett 15 Benenden, Kent, England Daughter
Richard Parrett 49 Cranbrook, Kent, England Head
Richard Parrett 13 Benenden, Kent, England Son
RG10/950 Cranbrook Folio 42
Pauline
You could also use
www.1837online.com/www.familysearch.org to confirm these birth details from the 1861/1881 censuses.