Link to the suburb of Brabham, out of Perth WA
https://www.google.com.au/maps/place....9692105?hl=en
Includes the old Caversham circuit at the southern end, scene of the 1957 & 1962 Australian GP, neither won by Jack. The WW2 airstrips clearly visible.
Back to Gnoo Blas it seems to have been well attended but the follow up reporting has been non existent. Hope I'm wrong.