Between the plateau edge and the sea, Adelaide and the Gulf towns lie along a narrow strip of lowland. The Gulf of St. Vincent is merely part of a larger gulf which is interrupted by Yorke Peninsula, so that we have really one great inlet running up to Port Augusta at the head of Spencer Gulf. The west side of this gulf is formed by another plateau which slopes away from the sea towards the salt lakes and marshes of the interior. We thus have two plateaus and a lowland in between, partly flooded by the sea. A portion of the surface has dropped down between two lines of cracks or faults, and a rift valley has been formed. Lake Torrens occupies the northern end of this valley. It is the eastern side of the valley, together with a small part of the back of the plateau, which constitutes the real South Australia. We may notice that the local railways are almost confined to this area. There is, however, one important piece of the State outside this area. South of Lake Alexandrina we see a long curving coast, bounded by sandbanks enclosing a string of lagoons, the Coorong; behind it is the scrub country which we have met already in the north-west district of Victoria. Beyond this, in the south-east corner, especially around Mount Gambier, we find the same conditions as on the neighbouring coast regions of Victoria. There is considerable rainfall and there are even 10 fresh-water lakes, as we see here. The soil, too, is fertile, since Mount Gambier belongs to the volcanic area of Victoria; so that there is agriculture and dairy farming, and oats are grown. But the district is cut off from Adelaide by land and has rather a detached existence, though the railways now being built or planned will alter this. We will now explore the country round Adelaide. In the Mount Lofty ranges, east of the city, there are streams and waterfalls; 11 but the rivers of the plain are very small and do not suggest a very heavy rainfall. Everywhere are orchards and vineyards growing fruits which are not grown in the open air in England. Here is an orchard quite near the city, and here is an orange 12 tree laden with ripening fruit. The rainfall is very light and comes mostly in the winter, while the summers are hotter than 13 in most of the occupied regions of Australia. We have the sunny climate of the Mediterranean and a corresponding vegetation. Yet it is healthy for white people, in spite of the heat, owing to the dry clear air; while the highlands only a few miles away offer a refuge in the summer.