All that Melbourne Steamship Co. Ltd. v. Moorehead (supra), decided, as I read the judgments, was that the power to require information pursuant to s.15B was a power to be exercised for the purpose of ascertaining whether criminal proceedings for an offence should be instituted by the Attorney-General or whether the Attorney-General should give his written consent to civil proceedings being instituted. In this regard, it is relevant to bear in mind that, under the Australian Industries Preservation Act, 1906 (s.14), in contrast to the position under the Act, no proceedings could be instituted other than by, or with the written consent of the Attorney-General. Once such proceedings were instituted and the matter had passed beyond the stage of preliminary administrative inquiry into pending judicial proceedings, the power was, so far as the alleged offence the subject of the proceedings was concerned, spent or exhausted. It is plain from the majority judgments that the case does not establish that the mere fact that there were pending judicial proceedings which related to a particular suggested offence precluded the use of the procedure under s.15B for the purposes of a proper collateral preliminary inquiry such as whether another person was a party to the alleged combination or whether another person should be added as a party to the existing proceedings. The evidence that, in that case, the s.15B power was being purportedly used in aid of the pending proceedings precluded that question from arising for decision (see, ibid, per Griffith C.J. at p. 343 and per Barton J. at p. 346). A fortiori, the case is not authority for the proposition that, if it had been possible for private civil proceedings to be instituted under the Australian Industries Preservation Act, 1906 without the written consent of the Attorney-General, the institution of such private proceedings would have precluded the Comptroller-General from using, or continuing to use, the powers conferred by s.15B for the purposes of a preliminary administrative inquiry as to whether the Attorney-General should either institute, or give his written consent to the institution of, independent proceedings.