Cedric Stanton Hicks, Professor of physiology and pharmacology at the University of Adelaide, testified that of a group of drugs, variants of a drug in that group he called "number 1" and in particular "number 2" were extremely toxic in a relatively small oral dose that would be extremely difficult if not impossible to identify even if it had been suspected in the first instance. He gave Cleland a piece of paper with the names of the two drugs which was entered as Exhibit C.18. The names were not released to the public until the 1980s as at the time they were "quite easily procurable by the ordinary individual" from a chemist without the need to give a reason for the purchase. (The drugs were later publicly identified as digitalis and ouabain, both of which are cardenolide-type cardiac glycosides.) Hicks noted the only "fact" not found in relation to the body was evidence of vomiting. He then stated its absence was not unknown but that he could not make a "frank conclusion" without it. Hicks stated that if death had occurred seven hours after the man was last seen to move, it would imply a massive dose that could still have been undetectable. It was noted that the movement seen by witnesses at 7 p.m. could have been the last convulsion preceding death.