Mary,
I have 1871 census which shows Willam aged 54 - Master Tailor employing 5 men. His wife Elizabeth Kewley(Curphey) aged 38 and Elizabeth Kewley daughter aged 19 who was the daughter of William and Margaret Craine. William was a widower when he married Elizabeth Curphey in 1880. That's where my info stops. I don't know what happened to the rest of the family - presumably married. And don't know when William died. Since he was in business there may be some way of finding out what happened next.
Millie