It is necessary, therefore, to proceed upon the basis that the offences of culpable driving were committed by Renshaw. It is those offences which the appellant was alleged to have aided, abetted, counselled or procured. To have done so he must have intentionally participated in the principal offences and so must have had knowledge of the essential matters which went to make up the offences of culpable driving on the occasion in question, whether or not he knew that those matters amounted to a crime: see Johnson v. Youden [21] ; Reg. v. Churchill [22] . As Viscount Dilhorne put it in Reg. v. Maxwell [23] , " it is clear that a person cannot properly be convicted of aiding and abetting in the commission of acts which he does not know may be or are intended": see also Abley v. Crosaro [24] ; Blackmore v. Linton [25] ; Dennis v. Pight [26] . The requirement of intention on the part of an aider, abettor, counsellor or procurer or, if we may use the term, a secondary participant in a crime, is a requirement at common law and it is a requirement which is not affected by s. 351 of the Crimes Act. That section merely restates the common law by providing, in effect, that in proceeding against a secondary participant in a misdemeanour, no distinction is to be drawn between the principal offender and the secondary participant: see Du Cros v. Lambourne [27] ; Gould & Co. v. Houghton [28] ; Carter Patersons & Pickfords Carriers Ltd. v. Wessel [29] ; Richards v. McPherson [30] ; Ex parte Coorey [31] . Whilst in the case of felonies, separate offences are committed by principals in the second degree (aiders and abettors) and accessories before the fact (counsellors and procurers), a person who aids, abets, counsels or procures the commission of a misdemeanour may at common law be proceeded against as a principal because " it is not worth while to regard inferior criminals through a microscope, or to classify them scientifically, as felons were treated when most felonies were capital offences so far as the principals were concerned": see Gould & Co. v. Houghton [32] , per Darling J. It is the common law position which s. 351 of the Crimes Act expresses and in so doing it does not exclude a guilty mind as a necessary ingredient of secondary participation in the commission of a misdemeanour.