“11. What, however, we are now concerned with is whether the statement in the order of September 1959 that the case did not involve any substantial question of law is an “error apparent on the face of the record”. The fact that on the earlier occasion the Court held on an identical State of facts that a substantial question of law arose would not per se be conclusive, for the earlier order itself might be erroneous. Similarly, even if the statement was wrong, it would not follow that it was an “error apparent on the face of the record”, for there is a distinction which is real, though it might not always be capable of exposition, between a mere erroneous decision and a decision which could be characterised as vitiated by “error apparent”. A review is by no means an appeal in disguise whereby an erroneous decision is reheard and corrected, but lies only for patent error”. (emphasis supplied)