The jurisdiction of this Court to entertain the appeal arises, if not under the Constitution, at all events under s. 64 of the Papua and New Guinea Act 1949-1950. Sub-section (1) of that section provides that the High Court shall have jurisdiction, with such exceptions and subject to such conditions as are provided by ordinance, to hear and determine appeals from all judgments, decrees, orders and sentences of the Supreme Court of the Territory. The language of the provision follows s. 73 of the Constitution and in this respect is not identical with that of s. 24 of the former Judiciary Ordinance 1921-1938 of New Guinea, where the words are "grant leave to appeal from any conviction, sentence, decree or order of the Supreme Court". In Cranssen v. The King [1] , the manner in which under that ordinance this Court should exercise its powers upon appeal with respect to sentences of imprisonment was discussed. The following observations were made: - "Section 24 of the Judiciary Ordinance 1921-1927 expressly mentions convictions and sentences among the judicial orders from which an appeal by leave shall lie to this court. It is evident that these words refer to convictions on indictment and sentences of imprisonment or other punishment. This court is thus specifically given a jurisdiction to hear appeals from sentences of the Supreme Court of the territory. But, although this consideration may distinguish the power it is called upon to exercise from the general appellate power invoked in House v. The King [2] , it remains true that the appeal is from a discretionary act of the court responsible for the sentence. The jurisdiction to revise such a discretion must be exercised in accordance with recognized principles. It is not enough that the members of the court would themselves have imposed a less or different sentence, or that they think the sentence over-severe. There must be some reason for regarding the discretion confided to the court of first instance as improperly exercised. This may appear from the circumstances which that court has taken into account. They may include some considerations which ought not to have affected the discretion, or may exclude others which ought to have done so. The court may have mistaken or been misled as to the facts, or an error of law may have been made. Effect may have been given to views or opinions which are extreme or misguided. But it is not necessary that some definite or specific error should be assigned. The nature of the sentence itself, when considered in relation to the offence and the circumstances of the case, may be such as to afford convincing evidence that in some way the exercise of the discretion has been unsound. In short, the principles which guide courts of appeal in dealing with matters resting in the discretion of the court of first instance restrain the intervention of this court to cases where the sentence appears unreasonable, or has not been fixed in the due and proper exercise of the court's authority. Moreover, this court has always recognized that, in appeals from courts of the territories, there may be many matters upon which the court appealed from is in a better position to judge than we can be. It is familiar with the special conditions which obtain in the territory and thus should be better able to estimate the importance of considerations arising out of them, or the significance of facts associated with them" [1] . Although the language of s. 64 of the Papua and New Guinea Act differs from that of the old Judiciary Ordinance, there is nothing in the difference to weaken the application of the principles stated in this passage to appeals under s. 64. It is not enough in applying those principles that the judges of this Court should regard the sentence as greater than they themselves would have imposed. In the present case a sentence of four years' imprisonment is probably substantially greater than would have been imposed upon the applicant by a court sitting in Australia itself. But that is not enough. Before we interfere with the discretion exercised by the learned Chief Judge we must be satisfied that in some way his discretion miscarried or the exercise of it was unsound or unreasonable. The observation that his Honour made concerning the possible benefit which the prisoner might obtain from a longer term in gaol cannot fairly be regarded as expressing a ground which determined the exercise of his judgment. It was no more than an observation as to what advantage it might be hoped the prisoner might obtain in the course of his punishment. There is in truth no ground which would justify this Court in interfering. If the sentence is to be reduced it must be done by the clemency of the Executive.