In time of severe drought the Dieri of Central Australia, loudly lamenting the impoverished state of the country and their own half-starved condition, call upon the spirits of their remote predecessors, whom they call Mura-muras, to grant them power to make a heavy rain-fall. For they believe that the clouds are bodies in which rain is generated by their own ceremonies or those of neighbouring tribes, through the influence of the Mura-muras. The way in which they set about drawing rain from the clouds is this. A hole is dug about twelve feet long and eight or ten broad, and over this hole a conical hut of logs and branches is made. Two wizards, supposed to have received a special inspiration from the Mura-muras, are bled by an old and influential man with a sharp flint; and the blood, drawn from their arms below the elbow, is made to flow on the other men of the tribe, who sit huddled together in the hut. At the same time the two bleeding men throw handfuls of down about, some of which adheres to the blood-stained bodies of their comrades, while the rest floats in the air. The blood is thought to represent the rain, and the down the clouds. During the ceremony two large stones are placed in the middle of the hut; they stand for gathering clouds and presage rain. Then the wizards who were bled carry away the two stones for about ten or fifteen miles, and place them as high as they can in the tallest tree. Meanwhile the other men gather gypsum, pound it fine, and throw it into a water-hole. This the Mura-muras see, and at once they cause clouds to appear in the sky. Lastly, the men, young and old, surround the hut, and, stooping down, butt at it with their heads, like so many rams. Thus they force their way through it and reappear on the other side, repeating the process till the hut is wrecked. In doing this they are forbidden to use their hands or arms; but when the heavy logs alone remain, they are allowed to pull them out with their hands. The piercing of the hut with their heads symbolises the piercing of the clouds; the fall of the hut, the fall of the rain. Obviously, too, the act of placing high up in trees the two stones, which stand for clouds, is a way of making the real clouds to mount up in the sky. The Dieri also imagine that the foreskins taken from lads at circumcision have a great power of producing rain. Hence the Great Council of the tribe always keeps a small stock of foreskins ready for use. They are carefully concealed, being wrapt up in feathers with the fat of the wild dog and of the carpet snake. A woman may not see such a parcel opened on any account. When the ceremony is over, the foreskin is buried, its virtue being exhausted. After the rains have fallen, some of the tribe always undergo a surgical operation, which consists in cutting the skin of their chest and arms with a sharp flint. The wound is then tapped with a flat stick to increase the flow of blood, and red ochre is rubbed into it. Raised scars are thus produced. The reason alleged by the natives for this practice is that they are pleased with the rain, and that there is a connexion between the rain and the scars. Apparently the operation is not very painful, for the patient laughs and jokes while it is going on. Indeed, little children have been seen to crowd round the operator and patiently take their turn; then after being operated on, they ran away, expanding their little chests and singing for the rain to beat upon them. However, they were not so well pleased next day, when they felt their wounds stiff and sore. In Java, when rain is wanted, two men will sometimes thrash each other with supple rods till the blood flows down their backs; the streaming blood represents the rain, and no doubt is supposed to make it fall on the ground. The people of Egghiou, a district of Abyssinia, used to engage in sanguinary conflicts with each other, village against village, for a week together every January for the purpose of procuring rain.
Some years ago the emperor Menelik forbade the custom. However, the following year the rain was deficient, and the popular outcry so great that the emperor yielded to it, and allowed the murderous fights to be resumed, but for two days a year only. The writer who mentions the custom regards the blood shed on these occasions as a propitiatory sacrifice offered to spirits who control the showers; but perhaps, as in the Australian and Javanese ceremonies, it is an imitation of rain. The prophets of Baal, who sought to procure rain by cutting themselves with knives till the blood gushed out, may have acted on the same principle.
There is a widespread belief that twin children possess magical powers over nature, especially over rain and the weather. This curious superstition prevails among some of the Indian tribes of British Columbia, and has led them often to impose certain singular restrictions or taboos on the parents of twins, though the exact meaning of these restrictions is generally obscure.
