Chilla, I'm sure I saw more photo's, but can't find them.
That photo may be from the following book:
TALL TREES & TALL TALES
Stories of old Pemberton - a marvellous reminiscence of
the characters and places of the big timber country.
by John Morris & Roger Underwood ( ISBN: 0 85905 168 4 )
Listed for page 23 are:
Harvesters (Hops - plucking fingers)
Hops (Growing)
Hops ('On The')
Gardens (Bunn's Hop)
I did a search on the LISWA telnet catalogue and found copies at:
(Dewey# 994.12/PEM)
3rd floor Battye shelves,(? dunno where that is, but same name as bottom of photo)
Scarborough, Broome, Bentley and Manjumup.
Maybe the photo is of the Bunns?
Theres also a 'Hop Garden Road' in Pemberton, a fair bet its named after the farm in the photo.