History of psilocybin mushroom use in Australia

"However the news [that there were psilocybin mushroom] reached Hawaii, the unknown surfer carried it to Australia in 1969, where he or she recognised the distinctive form of psilocybe cubenis sprouting plentifully from cowpats. That summer proved to be a bumper year for the mushroom in Queensland, which resulted in a craze among the young..." (From Andy Leach (2006), Shroom: a cultural history of the magic mushroom. London: Faber and Faber. 223)

Anyone know who the "unknown american surfer" is that first identified psilocybin mushroom in Austrsalia? GG seems the obvious candidate. In inner most limits of pure fun, shot '68 and '96, GG has a scene showing how to identify gold tops.