I can't check these with the NSW BDM, however according to Ancestry marriage records:
Clara May OLIVE married Thomas DARCY at Grafton in 1895.
Clara May DARCY married Frederick SMITH at Grafton in 1907.
Clara May SMITH married Frederick HOPE at Manly in 1920. (Marriage certificate on Ancestry - her parents: George William OLIVE (grazier, dec) and Thurza COLLINS.
Modified to add:
Tricky without the NSW BDM, but I can't see a death for Julia DARCY between 1892 and 1895. Also, the 1892 marriage does say Thomas was born Sydney (not Grafton).