I found the following entry in the England 1871 census RG10/4371 Folio 81 p33
Cowcliffe Lane Huddersfield
Squire Sutcliffe Head Mar 28
Ellen Sutcliffe Wife Mar 23
Martha Sutcliffe Dau Unm 4
Harry Sutcliffe Son Unm 2
Sam Sutcliffe Son Unm 2mths
This at least suggests that Squire Sutcliffe married an Ellen, and the GRO reference of Dec 1865 accounts for the age of the children.
I would apply for the marriage certificate again and leave the spouse field blank. I know this is a risk, but it may be that she is shown as say Elizabeth Ellen, or the handwriting may not be clear enough for some-one to read Hartley.
Good luck, Colin