Hi Gypsy - and Welcome to Rootschat
Grazeley was not a parish as such, as far as I can see it would have come under Burghfield, however thats not helping much cos I can't find you William before 1891 (yet) - do you have the 1891 & 1901 listings of him and family?
Alice's birthplace I think is Shinfield not Therfield, it is very faint in 1891 but I think that's what it said and it would tie in with this one from 1881
from 1881 shinfield
Thomas Fullbrook 55 Ag Lab
Jane Fullbrook 55
Emily Fullbrook 19
Thos. Fullbrook 16 gardener
Alice Fullbrook 15
All born Shinfield
The only way to be certain of course is to purchase the marriage certificate

Debbie