Dave
Most probably from the Harbour Commission.
My late father in law was Commercial Manger there until 1995 and he got me to index the photographic collection which in the main were in great big proper photo albums and dated from the 1920s. Included pictures of the harbour, ships, Commissioner's head office and some staff.
I have copies of some of them.
Needless to say after he retired I was after some pictures of Hudson ships which I knew they had and these could not be found
Regards
Graham