think i have found his wife in 1871
by this census record her marriage to william was her second marriage and it was elizabeth white he married
1871
RG10/5294/93/32
elizabeth prosser age 41. b. worle,somerset. occ. laundress. head(marr)
sarah white age 19. b. chepstow. occ. laundress. daughter
charles white age 14. b. chepstow. occ. factory boy. son
living at;8,nelson street,chepstow,monmouth(so living in the same street as her husband william who was living at 1,nelson street in 1871)