His story was that the ice van was travelling over the crown of the road with its off side wheels on the wrong side and left him no room to pass. He was riding in his third gear, not his highest, and travelling at a moderate speed, fifteen miles per hour according to his evidence, about twenty-five miles per hour according to the evidence of the defendants. Their story was that they were over to their left of the bitumen as far as their vehicle could go. The bitumen was only twelve feet wide. On their left-hand side at the edge of the bitumen there was what amounted to a watercourse, a water "causeway" the elder defendant called it. On the left of the road he said, "there is a hill that comes down sheer like that" (referring to the cutting); "it is clay and rock formation; then there is the water causeway where the water runs the bitumen just goes sheer down, there is no shoulder above it at all." Asked about the depth of the watercourse "at the site of the accident" he replied, "Approximately it would be one foot to two feet, with variations, the holes." The plaintiff's case took by no means this view of the features of the locus in quo as they existed at the time of the accident. The place was identified by three photographs which were put in evidence for the plaintiff and the defendants appeared to acquiesce in the identification. A witness who had been at the time a police constable stationed at Collaroy was called for the plaintiff. He had gone to the scene of the accident immediately after it took place. In giving his evidence he looked at the photographs, stated the position of the vehicles and gave one or two details about the road at the curve depicted. He said that the width of the shoulder on the left or southern side, that is what at the accident would have been the defendants' left, was three feet and it was what he called "trafficable" and that on the opposite side there was no trafficable portion beyond the bitumen, it fell away downhill. At the trial, which lasted over one day, much attention was given to this contested question. On the second day the defendants called two witnesses familiar with Rickard Road who had been interviewed overnight, both friends of the younger defendant. The first, Barry Godden by name, said that he had gone up with him to the scene of the accident on the day following its occurrence. That defendant had shown him where it took place. He described the features he attributed to the bitumen strip, the "natural watercourse" alongside it, six inches to two feet six inches deep and two feet wide, and on the other side of the road (the plaintiff's side in the accident) a shoulder that was in his language "drivable for vehicles". The second such witness was named Adams. According to him before he came to the Court to give his evidence he had been taken that morning to the scene of the accident which was shown to him by Godden. He had, of course, known of the accident at the time it happened; and he had used the road so that he was familiar with its features. But clearly enough the purpose of taking him there on his way to the Court, which he said was his idea, was to enable him to speak of the particular place where the collision occurred. When he came to give his evidence he confirmed the description, as at the time of the occurrence, of the roadway and of the watercourse beside it to which Godden and the defendants had deposed. But he assigned the place which he had been shown as the site of the accident to a point in the road one hundred yards or possibly one hundred and fifty yards above that where the locus of the collision had been fixed up to that stage of the trial. On being asked whether he could fix the spot he said that there was a house on the left-hand side going up where they sell dogs and things and the spot was one hundred and fifty yards past that going up. He said that there was a bend to the left going up the hill and that Godden showed him that point. In cross-examination he said that it could only be during the last couple of years that the people had been selling dogs: it had a sign up "Boxer pups for sale"; but, he continued, he had made a mistake, the house was on the right-hand side not the left. However, he went on to say that the spot he was shown would be one hundred and fifty yards from the house he had in mind on the left which was where an old stonemason had a quarry. It would be one hundred yards up from where the pups were sold. One would have thought that this evidence made it important to fix the site of the house where the boxer pups are or were sold. If that point were fixed you could identify the place with more or less accuracy which Adams and he had been shown and which he purported to describe. You might conclude that Godden had described the same place. Was it in fact the place where the accident happened? Was it the same place as the defendants spoke of? As evidence in reply a witness named Barnes was called for the plaintiff. He said without objection that he had been present at Rickard Road when the photographs put in evidence had been taken. He was handed one of them and asked to identify a house shown at the bend where, or whereabouts, it will be recalled, the site of the accident had been placed by common consent before Godden gave evidence. The witness was then asked two questions both of which were objected to for the defendants and were rejected. They were directed to ascertaining whether that was not the house exhibiting the sign advertising the sale of boxer dogs. We were told that the identification of the position of the house was treated by the judge as not relevant but as going only to the credit of Godden and Adams and that it was for that reason that the evidence was rejected. Although it appears to have escaped notice at the trial, on the motion for a new trial one of the learned judges pointed out that on a very close scrutiny of one of the photographs it was possible to make out the figure of a dog standing in front of the house. This leaves little doubt what the rejected evidence would have proved. It is a fact which the jury might have regarded as important, namely that the place which Adams purported to describe to them was not the actual site of the accident; perhaps that might be true too of Godden's evidence and possibly even of the defendants themselves. It is difficult to see why this evidence was not relevant and admissible. It related to an objective fact serving to identify the place about the nature of which evidence had been given and the question whether it was the same place as that to which other evidence ascribed the accident was important. That it was admissible the judges of the Full Court of the Supreme Court all thought. The conclusion, however, that the evidence was erroneously rejected seems to me necessarily to mean that there must be a new trial. When material evidence has been erroneously rejected at the instance of the party who succeeds, then to deny nevertheless to the unsuccessful party the remedy of a new trial the Court must have some sure ground for saying that the reception of the evidence would not have affected the result or that it ought not to have done so. I do not rest my conclusion in this case upon the supposed difference between the common law rule which prevails in New South Wales and the provision made in the rules under the judicature system. The provision stands in England now as O. 58, r. 10 (2), but formerly it was O. 39, r. 6. The difference between the common law rule and the effect of that provision can easily be exaggerated by over-estimating the operation of the judicature provision in widening the discretion of the court and by under-estimating the effect of the common law rule in allowing a discretion to the court. In Holford v. Melbourne Tramway and Omnibus Co. Ltd. [1] , Cussen J. after referring to the provision said, "I think that the rule is very little different from the view which was taken by the courts before the Judicature Act. The courts would not necessarily direct a new trial if the misdirection was on an immaterial or collateral matter, or if the trial resulted in a verdict against the person in whose favour the misdirection operated, or if the mis-direction was in respect of a pure question of fact, and the judge's attention was not called to the mistake. But it is an error to think there never can be a wrong or miscarriage unless it can be shown that the jury were in fact influenced in giving their verdict by a mis-direction. There is a wrong or miscarriage occasioned by a mis-direction in law, or as to the application of evidence, if, as a final result of what has been said by the judge, the jury retire to their room under a wrong impression in relation to these matters, and the result of the case is such as to show that they may have been influenced in their verdict by the misdirection. "Miscarriage" is a technical word, and includes this technical meaning. The plaintiffs' counsel contended that the onus of showing the miscarriage is on the party asking for the new trial. I think this is clearly right, but I think that onus is satisfied when the facts appear to be as above set out, and that unless the party opposing the grant of the order for a new trial can point to some further fact, the conclusion that there was a miscarriage must be drawn" [2] . In Pratten v. The Labour Daily Ltd. [3] McArthur J. pointed out that, although in the foregoing passage Cussen J. had put the burden upon the party complaining of an error at the trial of satisfying the court of appeal that it amounted to a substantial wrong or miscarriage, the contrary had been said. "It has been said", remarked his Honour, "that if misdirection is established the onus of showing that it did not influence the result is on the party showing cause against a new trial" [4] . McArthur J. referred to two cases, Anthony v. Halstead [5] and White v. Barnes [6] . The second confirms a statement made in the first case by Grove J. during the argument, and by Lindley J., in his judgment, to the effect that it was for the party showing cause against a new trial to show that the misdirection did not influence the result. One might suppose that upon a question depending not upon proof of an issue by evidence but upon reasoning as to the effect of what from a record appears to have occurred at a trial, it would not matter much upon which side the duty lay of persuading the court that a given error involved a substantial wrong or miscarriage. In the first of the cases referred to there seems to have been a question as to the use of counsel's notes to show what had occurred at the trial. The judges spoke of producing "authentic evidence" to establish the miscarriage of justice. This expression, which doubtless related to the use of notes, has been repeated in a way calculated to cause misunderstanding. But, however this may be, both in the case of the common law rule and that under the judicature system inconsistent judicial statements may be found as to where the burden lies of satisfying the court of the tendency, or lack of tendency, of the misdirection or misreception of evidence or other error at the trial to affect the result. For example, in what is perhaps the most recent judicial discussion of the law and practice in New South Wales, I refer to that by Manning J. in his dissenting judgment in Honnery v. Smith [1] since considered in Lakeman v. Finlay [2] , the conclusion is expressed that "where the appellant complains that evidence has been wrongly rejected a new trial should be granted only if he satisfied the court that if it had not been so rejected the result of the trial might reasonably have been different" [3] . But the opposite burden of persuasion is stated in the formulation made in this Court in Piddington v. Bennett and Wood Pty. Ltd. [4] by Evatt J. of what was "at that time the accepted practice in New South Wales on the civil side" [5] . The words "at that time" refer to the time of the decisions in Makin v. Attorney-General for New South Wales [6] and Macleod v. Attorney-General for New South Wales [7] . His Honour's formulation of the then accepted civil rule was expressed in terms relating to the wrongful admission of evidence. The learned judge said "that the court would as a rule grant a new trial where evidence had been improperly admitted: but that in its discretion the court might refrain from granting a new trial if it was affirmatively satisfied that the actual verdict returned could not have been affected by the inadmissible evidence" [8] . If the question really be of any importance, resting as it does rather on processes of reasoning than upon proof of an issue of fact, the true view, it may be suggested, is that at common law it was necessary to grant a new trial unless the court felt some reasonable assurance that the error of law at the trial whether in a misdirection or wrongful admission or rejection of evidence or otherwise was of such a nature that it could not reasonably be supposed to have influenced the result or because, in any case, as a matter of law the same result must have ensued, while under the judicature rule the burden is the other way. The form in which the judicature rule is cast seems to indicate an intention that the court should not grant a new trial unless it reached a positive opinion, in other words unless it was persuaded that a substantial wrong or miscarriage had been occasioned by the error. This may form one distinction between the two rules. It is the view adopted in Best on Evidence, 12th ed. (1922), p. 70. Another distinction perhaps may be that a rather more substantial wrong or miscarriage has been required under the judicature rule than had been required at common law. But the existence of the distinction is doubtful. It must be remembered that the law relating to the grant of new trials was one that had continued to develop. That the remedy of a new trial was in many respects a substitute for a bill of exceptions was a consideration that long tended to prevent the refusal of a new trial where a bill of exceptions would have provided an effective remedy. But as time went on this consideration had ceased to govern the court's discretion. Probably what Higgins J. said in Robinson and Vincent Ltd. v. Rice [1] is justified in substance, namely that the same principle as that obtaining under the judicature rule applied both before the Common Law Procedure Act 1852 and since that in England and was applied in New South Wales. But whether it be the rule at common law or under the judicature system a much more important restraint must be observed upon the discretion of the court to refuse a new trial. The court, where the determination of questions of fact is not entrusted to it, cannot substitute its judgment for that of the jury in purporting to decide whether a substantial wrong or miscarriage has occurred. Care must be taken lest in exercising an authority to decide whether an error of law occurring at the trial is likely to have influenced the result, what is really done is to examine the evidence as if the court were forming a conclusion of fact for itself. The basal distinction between the court's duty and the function of the jury cannot be confused in this way. The question whether an error of law made at a trial calls for a new trial depends on definite considerations involving a legal criterion. Cases may be put on one side where, although there has been some error of law committed at the trial, whether in the judge's direction to the jury or in his rulings as to the reception or rejection of evidence, the verdict may be sustainable because the successful party in any case is entitled as a matter of law to such a verdict or because had a contrary verdict been returned it must have been set aside. Apart from such cases it is enough if it appears to the court deciding an application for a new trial that an error of law has been made at the trial which may operate to do any of the following three things - (a) improperly to limit or enlarge the evidentiary materials by which it is not an unreasonable hypothesis to suppose the judgment of the jury might be affected, even if illogically; or (b) in the case of misdirection touching standards or criteria of liability, wrongly to expose the party to a hazard that is appreciable and not illusory of a verdict for or against him that otherwise might not have been found; or (c) in matters of burden of proof, of the legal need of corroboration or of other like incidents of the jury's consideration of the case, to provide an erroneous guidance which it is not unreasonable to regard as capable of contributing to the result. These categories are probably not exhaustive but it is enough if a case falls within one of them; if it does it is necessary to treat it as involving a substantial wrong or miscarriage. What has been said relates entirely to misdirection, the erroneous reception or rejection of evidence and other errors of law. As to erroneous dealing with facts, for present purposes it is enough to refer to what Cussen J. says as to the distinction in Holford's Case [1] . But where the error is of law and is one of the foregoing description, it is not for the court to proceed to inquire into the facts of the case and form a conclusion as to what the jury would or should have done had the trial proceeded entirely in conformity with law and without any misdirection or misreception or erroneous rejection of evidence. That is what the decision of the House of Lords in Bray v. Ford [2] means. See per Lord Greene M.R. in Braddock v. Bevins [3] .