can i assume your grandfather is A Peel of Brambles farm ?
and that his parents lived in NZ ?
the way the return address is written normally means its
Mr A E Peel, as in Anthony Edward Peel.
and his wife would be Mrs Anthony Edward Peel, if you get my line of thought.
I will check the Electoral roll this arvo, about 3 am your time.

the house still exists, but no Peels living in it.