(iii) The persevering wizard is often aided by coincidences. An Australian squatter at Morton’s Plains, after a drought, promised a native rain-maker half a bullock, a bag of flour and some tea, if he would fill his new tank for him before the morrow night. The rain-maker set his rites and spells to work, filled the tank and got the reward.[505] Whilst Messrs. Spencer and Gillen were with the Urabunna tribe, “the leading rain-maker performed a ceremony and within two days there was a downpour—possibly connected with the fact that it was the usual time for rain to fall in that part of the country.” The reputation of the rain-maker was firmly established, and, no doubt, his self-confidence. The Australian wizard already mentioned, who thought that his Magic had entered his own head, claimed to have driven away a comet by means of his magic stones. Certainly the comet disappeared, and what other cause could any one point out? “At one time the gusts were very unpleasant and one of the men told a wind-man to make it stop. Accordingly he shouted out to the wind, and in a minute there was a lull; and no one doubted that this was due to the power of the wind-man.”[506] Many similar cases might be given.[507] Striking coincidences are not very rare: there is an illogical prejudice that they are rare because they excite wonder. Moreover, as I have observed, so remote a resemblance to the event shamanised or prophesied may be regarded as a fulfilment, that fulfilment is not uncommon. In the interpretation of omens, where there is only the alternative of good or ill success, half the guesses must be right; and by the glozing of doubtful cases, more than half will seem to be right. And as for the effect of coincidence, Mr. Basil Thompson says, “Tongans never admit coincidences”[508]—that is to say, in our sense of the word: for them, in what we call coincidence, there must be causation; and this seems to be generally true of the untutored mind. Among the Churaches, the profession of shaman is generally hereditary; but a man may become a shaman against his will. It is enough “to make a lucky guess as to the issue of some event, and people flock to him for advice from all parts.”[509] How many failures are necessary to discredit one lucky guess?