I'm beginning to think you must be right, aghadowey. Having quizzed him again, my husband says it was meant to be the grandfather, not great grandfather, who was born in Wexford. We know _he_ was born in Clintoe, Monaghan, as we have seen his birth certificate.
The first child of Sarah Boag/Bogue and Thomas Wright was Margret/Maggie born in Monaghan abt 1886, according to the censuses in 1901 & 1911.
I've tried looking for a marriage with either maiden name around 1886, give or take a few years. Nothing in Monaghan to Thomas Wright. That's using familysearch.org and rootsireland.ie. Not much chance of an Irish visit any time soon.
Unfortunately, Sarah died in 1901, just after the census, so she does not appear in 1911. Therefore there is no mention of number of years married or children alive or dead.