So many discrepancies from the 3 censuses, I thought it was a different family...George's birth...from 1814 to 1822 to 1824...So that might probably be their marriage, then... ( note places of birth change with each census entry

)
I.G.I. submitted file has this down a Melicent Harwood born 1809 Piddletown
with parents Richard Harwood & Hannah - Married 1808 Piddletown, Dorset
Dates may be wrong, but parents may be right...
http://www.familysearch.org/Eng/Search/frameset_search.asp