The Hawker biplane series of light bombers and fighters began with the Hawker Hart of 1927. The Hart was a sensation when it appeared, with a top speed of almost 200 mph, and many variants developed over the next six or seven years. The Demon was an Ďarmy co-operationí version, with a message hook.
They were delivered to the RAAF from March 1935 until late 1938. See http://www.adf-serials.com/ and other internet sources for more information.
The Wills collection consists of the following:
A1-2: accident, Squadron Leader Jones, Director of Training at Laverton 1935
A1-3: Major file on accident at Swansea, Tasmania. February 6 1936: poor technical quality, but worthwhile!
A1-5: picture only
A1-8: the aircraft recovered from the bush near Waratah, Tasmania, in 1977 and later restored at Point Cook
A1-36: Crash at Cootamundra, 7 December 1937: also a paragraph re A1-47 crash1940
A1-47 crash at Werribee, Leading Aircraftsman R. E. Muller, of St. Morris, South Australia killed 1940
Material on the Demon crash inquiry
(I am particularly interested in the use of the Hart-type series in Air Control bombing in Afghanistan, Pakistan, Iraq, etc 1919-39 and in the West African campaigns of World War II. If interested, email me at firstname.lastname@example.org )