I posted the last message before the discrepancy in dates registered. Sorry.
I think the answer is that you have tracked two different men, both named William Arthur Hardy. The W.A. Hardy who married Susan Healan was born about 1854 and died on July 3, 1933. The W.A. Hardy you mention was born in 1843 and died in 1917. Sure sounds like 2 different people. They may be related but could not be the same person.