It will not be out of place to append here an account of the method employed in searching for water. Water is mostly to be found in valleys, whether formed by the intersection of declivities or lying at the lower part of mountains. Many persons have been of opinion that all places with a northern[1] aspect are naturally provided with water: a point upon which it will not be amiss to explain the diversities presented to us by Nature. On the south side of the mountains of Hyrcania it never rains; and hence it is that it is only on the northeast side that they are wooded. As for Olympus, Ossa, Parnassus, the Apennines, and the Alps, they are covered with wood on every side, and abundantly watered with streams. Some mountains, again, are wooded on the south side, the White[2] Mountains in Crete, for example. On this point, therefore, we may come to the conclusion that there is no rule which in all cases holds good.