Bearing in mind there were probably a few Frederick Cadbys about...
A birth registered 1st quarter 1872 in Kings Norton (Worcestershire then) vol 6c page 470
Marriages 3rd qu. 1894 at West Bromwich vol 6b page 1099
and 2nd qu. 1897 at Birmingham vol 6d page 84
A birth Frederick R Cadby 4th qu. 1910 registered Kings Norton vol 6c page 437.
One of these might be your man or his son.