And:
"… the absence from the books of any case in which a Superior Court has assumed to exercise a supervisory jurisdiction over magistrates whilst acting in the exercise of this authority - an authority which has been vested in them for hundreds of years - is a strong indication that their power to examine and commit is in contemplation of the law, purely executive in its nature.
23 In substance, a committing magistrate determines nothing, except that in his opinion a prima facie case has been made out for committing the accused for trial" (supra at 147 per Jordan CJ).
24 The reasoning involved in Ex parte Cousens; Re Blacket (supra) applies a fortiori to a decision of a magistrate antecedent to and subsumed in the decision to commit an accused person for trial on an indictable offence.
25 In my opinion this reasoning is sufficient to deny the plaintiff an order in the nature of certiorari.
26 The question of mandamus remains outstanding. The principles applicable to orders in the nature of mandamus have been definitively stated in The King v. War Pensions Entitlement Appeal Tribunal; ex parte Bott (1933) 50 CLR 228. Rich, Dixon and McTiernan JJ said:
A writ of mandamus does not issue except to command the fulfilment of some duty of a public nature which remains unperformed. If the person under the duty professes to perform it, but what he actually does amounts in law to no performance because he has misconceived his duty, or in the course of attempting to discharge it, has failed to comply with some requirement essential to its valid or effectual performance, he may be commanded by the writ to exercise his function according to law de novo at any rate if a sufficient demand or request to do so has been made upon him. In the case of a tribunal, whether of a judicial or an administrative nature, charged by law with the duty of ascertaining or determining facts upon which rights depend, if it has undertaken the enquiry and announced a conclusion, the prosecutor who seeks a writ of mandamus must show that the ostensible determination is not a real performance of the duty imposed by law upon the tribunal. It may be shown that the members of the tribunal have not applied themselves to the question which the law prescribes, or that in purporting to decide it they have in truth been actuated by extraneous considerations, or that in some other respect they have so proceeded that the determination is nugatory and void. But the prosecutor who undertakes to establish that a tribunal has so acted ought not to be permitted under the colour of doing so to enter upon an examination of the correctness of the tribunal's decision, or of the sufficiency of the evidence supporting it, or of the weight of the evidence against it, or of the regularity or irregularity of the manner in which the tribunal has proceeded. The correctness or incorrectness of the conclusion reached by the tribunal is entirely beside the question whether a writ of mandamus lies. " (at 242 - 243).
27 The legal principles set out in the above passage are applicable in New South Wales. For example in Ex parte Hebburn Ltd; Re Kearsley Shire Council (1947) 47 SR (NSW) 416, Jordan CJ in dealing with an application for mandamus to require a Magistrate to hear and determine an appeal by the applicant against the assessment of certain land for a local lighting rate under the Local Government act 1919, said:
" ... the mere fact that a tribunal has made a mistake of law, even as to the proper construction of a statute does not necessarily constitute a constructive failure to exercise jurisdiction: The King v. Minister of Health (1939) 1 KB 232 at 245-6. But there are mistakes and mistakes; and if a mistake of law as to the proper construction of a statute investing a tribunal with jurisdiction leads it to misunderstand the nature of the jurisdiction which it is to exercise, and to apply 'a wrong and inadmissible test': Estate and Trust Agencies (1927) Ltd v. Singapore Improvement Trust (1937) AC 898 at 917; or to 'misconceive its duty' or 'not to apply itself to the question which the law prescribes': The King v. War Pensions Entitlement Appeal Tribunal (supra); or 'to misunderstand the nature of the opinion which it is to form': The King v. Connell (1944) 69 CLR 407 at 432, in giving a decision in exercise of its jurisdiction or authority, a decision so given will be regarded as being in purported and not in real exercise of jurisdiction, leaving the jurisdiction in law constructively unexercised, and the tribunal liable to the issue of a prerogative writ of mandamus to hear and determine the matter according to law: The King v. Board of Education (1910) 2 KB 165 (supra at 420)."
28 In Saffron v. The Director of Public Prosecutions (1989) 16 NSWLR 397 Priestley JA (with whom Samuels JA agreed) summarised the approach of Jordan CJ in Ex parte Hebburn (supra) into two principal points as follows:
"1. A magistrate may make a mistake of law, even as to the proper construction of a statute without constructively failing to exercise jurisdiction.
2. A mistake of law as to the proper construction of the statute investing a Magistrate with jurisdiction which leads the Magistrate to misunderstand the nature of the jurisdiction so that (i) he applies a wrong and inadmissible test or (ii) misconceives his duty or (iii) does not apply himself to the question which the law prescribes or (iv) misunderstands the nature of the opinion he must form, will make the magistrates decision one given in a purported and not a real exercise of jurisdiction". (supra at 418)