Hello Sue,
I had the same problem. My ggf managed to miss the 1881, 1891 and 1901 censuses. You would swear that he did not exist. I am yet to find his death record for 1929-ish.
He took the family to South Africa in about 1880. Most of them returned in the late 1890s, but he was back in Cape Town sorting out his business affairs in 1901.
I would guess that he was simply out of the country. Travel was easier than we often imagine.
The marriage certs of John's children may note that he was deceased.
You could also try historical post office directories.
Good luck!
Justin Levy
(Dublin, Ireland)