On the question of admissibility, then, the ratio decidendi of Beldan was that the proviso to s.671B applies to appeals by the Attorney-General, but does not preclude the admission of evidence of the kind there in question. The passage in the judgment of McPherson, J. was approved and applied in R. v. J[52] by Olsson, J. (with whom King, C.J. and Mullighan, J. agreed) and in Chanh Nghia Ly[53], both of which were Crown appeals where prisoners had failed to honour undertakings to give evidence against co-offenders on the basis of which they had been sentenced.[54] The passage had earlier been referred to with approval by Hunt and Badgery-Parker, JJ. in R. v. Cartwright[55]. Finally, I refer again to R. v. Kane. That also was a Crown appeal. Although the Full Court did not find it necessary to have resort to the additional evidence tendered by the Crown, and provisionally admitted, it said[56], "[T]hat evidence would appear to be admissible ... as tending to establish an induced misapprehension by the judge as to a material matter ..., producing a miscarriage of justice."[57] In my view, considerations of policy and justice support the interpretation and operation given to the proviso by McPherson, J. and this Court should follow the decision of the Queensland Court of Criminal Appeal. The evidence is received and used, not on the merits of the respondent's personal circumstances, but to destroy or negate[58] false material as to those matters put to the sentencing judge.