The appellant's trial, on which he was convicted of being in possession of prohibited imports (some 85.9 g of heroin) contrary to s 233B(1)(ca) of the Customs Act 1901 Cth, took place in the County Court (Vic) in late April and early May 1985. Understandably, in the light of then current authority (see for example Ditroia [1981] VR 247), the learned trial judge failed to direct the jury in accordance with what was subsequently decided by this Court in He Kaw Teh (1985) 157 CLR 523; 15 A Crim R 203, namely, that on a prosecution of such an offence, the prosecution bears the onus of proving that the accused acted with mens rea, that is to say, with a guilty mind. As the judgment of Hampel J (with whom Murray and McGarvie JJ agreed) in the Court of Criminal Appeal (Vic) and the joint judgment of Toohey and Gaudron JJ in this Court demonstrate however, it is quite fanciful, in the context of the trial and the unmistakable inferences to be drawn from the jury's verdict of guilty, to suggest that there has been a possible miscarriage of justice in the sense that that failure of the learned trial judge deprived the applicant of any real chance of acquittal which he otherwise might have possessed. The reason for that is that the issue between the applicant and the prosecution on the trial was whether the applicant was in possession of the drug. If, contrary to the whole of the applicant's case, he was found to have been in possession of the drug, there was simply no room for any suggestion that he was ignorant of either its existence or its nature. In these circumstances, the decision of the Court of Criminal Appeal (Vic) that the case was one in which the proviso of s 568(1) of the Crimes Act 1958 Vic should be applied, must be upheld.