Found the other Hyde sister, Harriet's marriage - she married Alexander CRAWFORD 1873.
Hi Loz
Good work !

Harriet CRAWFORD appears to have died in 1936 aged 87 !
(Couldn't find any issue for this couple ? Alexander possibly died in 1895 ? And there's a probate record for that name - at Whatawhata in the Waikato area ??)
Like you, neither could I find a George COULDREY marriage - with bride "Maria" - (may be indexed under a weird spelling perhaps ?)
Robert and Emily Sophia's daughter Bessie, was born NZ in 1884.
"Mr. W. COULDREY, of Maraetai, best man at the HYDE/POYNTER wedding 1891" :
This looks to be "
William COULDREY - farmer of Maraetai on 1893 electoral roll".
[Also at Maraetai same year - COULDREY -George, (farmer) Maria, Louisa and ... Edwin (farmer) ].
Lu