Local libraries certainly can have surprising collections of books, newspapers and journals all potentially touching indirectly on the topic of large significant vegetation.
A really great collection of photographs are to be found in the National Library of Australia:
I have found some incredible records that have helped gain rapid recognition of historical and cultural significance for trees, a process that might otherwise have been prolonged and protracted. Sometimes the results from a search can be just as surprising for me as anyone else, the pictures are little snap shots in time often revealing brief moments in the lives of the people within them....such pictures always leave me with the wish to know more about the subject matter.
Another view from the same era (1940's) looking back towards the bowls club from the beach: