The shamans do not appear to constitute a special caste or sacerdotal order, like the hierarchies of the Christian Churches. Some are hereditary, some elected by popular vote, so to say. They may be either men, or women (_shamanka_), married or single; and if "rank" is spoken of, it simply means greater or less proficiency in the performance of the duties imposed on them. Everything thus depends on their personal merits, which naturally gives rise to much jealousy between the members of the craft. Thus amongst the "whites" and the "blacks," that is, those whose dealings are with the good and the bad spirits respectively, there is in some districts a standing feud, often resulting in fierce encounters and bloodshed. The Buryats tell how the two factions throw axes at each other at great distances, the struggle usually ending in the death of one of the combatants. The blacks, who serve the evil spirits, bringing only disease, death, or ill-luck, and even killing people by eating up their souls, are of course the least popular, but also the most dreaded. Many are credited with extraordinary and even miraculous powers, and there can be no doubt that they often act up to their reputation by performing almost incredible conjuring tricks in order to impose on the credulity of the ignorant, or outbid their rivals for the public favour. Old Richard Johnson of Chancelour's expedition to Muscovy records how he saw a Samoyed shaman stab himself with a sword, then make the sword red hot and thrust it through his body, so that the point protruded at the back, and Johnson was able to touch it with his finger. They then bound the wizard tight with a reindeer-rope, and went through some performances curiously like those of the Davenport brothers and other modern conjurers[622]. To the much-discussed question whether the shamans are impostors, the best answer has perhaps been given by Castren, who, speaking of the same Samoyed magicians, remarks that if they were merely cheats, we should have to suppose that they did not share the religious beliefs of their fellow-tribesmen, but were a sort of rationalists far in advance of the times. Hence it would seem much more probable that they deceived both themselves and others[623], while no doubt many bolster up a waning reputation by playing the mountebank where there is no danger of detection.