Interesting stuff.
Page 1 "the quarried flint nodules from the cave were taken elsewhere and made into tools"
We also know from Haddons observations that flint was indeed a trade item.
http://www.dpi.nsw.gov.au/__data/ass...aborigines.pdf
This one is good too, with pics.
http://nma.gov.au/shared/libraries/a...stories_bw.pdf