This appeal concerns a street accident which took place on a quiet Sunday morning in July 1946 at the intersection of two streets or roads in an Adelaide suburb. Two vehicles collided, an ambulance and a sedan car, a 1933 Dodge. The present respondent, who is the plaintiff in the action, drove the sedan car. Riding in the car with him were his son, another young man, and an infant grandchild. The front of the ambulance struck the lefthand side of the sedan and turned it round and over. The sedan was struck at about the rear door. The plaintiff was hurt but apparently the other occupants of the car escaped injury. The ambulance was conveying a patient to hospital. It was an urgent case and the ambulance approached the intersection at some speed, with the siren sounding, as it has been found. The three grown occupants of the car say that they did not hear the siren and in this they have been believed. The apparent incompatibility of the two findings is explained upon the ground that all the windows of the sedan were shut except that by the driving seat, which of course was on the opposite side from the direction whence the sound came, and that moreover the hearing of the plaintiff who sat in the driver's seat was defective. Be that as it may, the plaintiff has been acquitted of contributory negligence in failing to hear the siren. The road upon which the plaintiff was driving his car is said to be four or five miles long and, while not a main highway, is regularly used by traffic travelling between distant points, whereas the cross street upon which the ambulance was driving is an ordinary suburban residential street and extends only about six hundred yards from the crossing in one direction and about half a mile in the other. The patient had been picked up at a house in this street about a quarter of a mile from the intersection. There is a steady but not very steep slope down to the intersection. The other road is level. The running surface of both roads is bitumen. The ambulance drove on the crown of the road, and as the driver approached the crossing he had a clear view on his left hand of the the other road over a vacant allotment. But on his right hand, whence the plaintiff's sedan was in fact approaching the intersection, his view was obstructed by some pittosporum trees which grew out over the footpath at the corner. When he did see the sedan he put his brakes on hard. The road showed braking marks for fifty-two feet back from the point where the ambulance came to a standstill, and that was little, if any, further than the point of impact. The ambulance was said to have gone four feet further than the point of impact. It may be assumed that at a standstill the front wheels were not more than six feet beyond it. It seems safe to infer that the driver of the ambulance saw the sedan when he was not less than seventy feet from the point of collision. That point has not been fixed with exactness by the witnesses, but the ambulance maintained a direct course while the sedan veered a little to its right, with the result that they met somewhat to the right of the centre of the road upon which the sedan was travelling. The continuation of the street upon which the ambulance was proceeding is not exactly opposite the same street on the other side. The fence lines or building lines of the respective parts of the street would, if produced, lie fifteen feet apart. The fence line of the part on the sedan's right, that is the continuation of the street, would be nearer to the sedan as it approached. That means that the plaintiff would draw level with the fence line of the continuation on his right fifteen feet before he drew level with the fence line of the street on his left, on which the ambulance was driving. As the South Australian rule is that vehicles give way to others crossing from the right, the plaintiff says he looked to his right first. There is a suburban hedge or fence at that corner, so that he could not see across the premises at the corner. He did not look to his left until the ambulance was nearly upon him. In the Local Court, where the action was tried, he said it was only ten or twelve feet away from him. He considered that the front of his sedan had at that instant crossed beyond the line of the edge of the bitumen of the intersection street on his left if that line had been produced or prolonged. He said that it was four feet over it. After a view had been had he was further questioned upon this point, and he firmly adhered to his opinion that his car had proceeded as far as this into the intersection before his glance to his left showed him the oncoming ambulance, then only ten or twelve feet away. It was agreed that the distance of this point or line from the fence alignment of the intersecting street, if produced, is fifteen feet. If the assumption be adopted that the ambulance was seventy feet from the point of collision when the sedan came into the ambulance driver's line or field of vision past the corner and the overhanging pittosporum, it would mean that there was at least forty feet of distance through which it was possible for the sedan to travel with the ambulance within the plaintiff's field of potential vision before the plaintiff became aware of its presence. It is true that if he were hugging the kerb perhaps the distance might be reduced. But he said that he was travelling about four and a half feet out from the kerb, and it is unlikely that it was less. It is of course not possible to estimate with exactness how far the plaintiff had proceeded when the ambulance driver saw him, but it is very probable that he was forty feet at least from the point of collision.