Hi Daithi,
From what i know that is the census in 1911 on Arran Quay of my grandfather and that is most definitely his marriage cert to my grandmother Margaret.
Now Richard Flood working in Guinness and dying in 1949 i don't know. My father never knew or met his grandparents in Dublin but the address seems correct as does his age. I see it says Richard was a widower so Mary Anne had died by 1949.
I'm so confused by the whole thing now.