The Australian Dictionary of Biography, http://adb.anu.edu.au/, is a wonderful free resource for family historians.
It contains several biographies of people connected with Hornsby. You can read about several of these by following the links below.
Brewster, Sarah Agnes Angus (1874–1957) headmistress and naturalist … principal of Hornsby Girls’ High School. She stocked the library, filled bare corridors …
Collingridge de Tourcey, George Alphonse (1847–1931) artist and historian … , Hornsby, where he published, irregularly, a journal called Progress, which combined …
Bancks, James Charles (Jim) (1889–1952) cartoonist … -porter, and his wife Margaret, née Beston. Brought up at Hornsby in a family he remembered …
Have you used this resource to locate family members?
Hornsby Shire Family History Group 