Hello Candis,
Difficult to say it could be as name & age (about right), it's a shame her birth place was not given. If it is here what's the connection to Somerset
There are quite a few Emily Harding's living/born in Somerset, here's a few, it could be one of these
1861c Emily L HARDING born 1857 Bath niece to Richard & Anna M Harding
1881 Emma L Harding 1860 Longton Somerset single parents Stephen & Hannah
1881/1891/1901census Emily Harding married (William) 1854 Lyme Regis Dorset
1861/1891 Emily Harding dau Thomas single 1858 Dom. Servant Somerset
It might explain why you can't find a marriage for George John Harding to Alice Louisa White. Obtaining the birth certificate of his daughter Louisa born 1885 may provide some clues.
It may be worth re-checking the 1891 census again for a George Harding with daughter Louisa, to confirm the one posted is correct. I may have missed something
records available perhaps they may clarify
http://www.nationalarchives.gov.uk/hospitalrecords/details.asp?id=481&page=37She could be buried here
http://webapp1.somerset.gov.uk/her/details.asp?prn=17546