that man; eat this, don’t kill him.” This satisfies the ghost; the soul is loosed from the tree and carried back to the sufferer, who naturally recovers.(186) A regular part of the stock-in-trade of a Dyak medicine-man is a crystal into which he gazes to detect the hiding-place of a lost soul or to identify the demon who is causing the sickness.(187) In one of the New Hebrides a ghost will sometimes impound the souls of trespassers within a magic fence in his garden, and will only consent to pull up the fence and let the souls out on receiving an unqualified apology and a satisfactory assurance that no personal disrespect was intended.(188) In Motlav, another Melanesian island, it is enough to call out the sick man’s name in the sacred place where he rashly intruded, and then, when the cry of the kingfisher or some other bird is heard, to shout “Come back” to the soul of the sick man and run back with it to the house.(189) (M37) It is a comparatively easy matter to save a soul which is merely tied up to a tree or detained as a vagrant in a pound; but it is a far harder task to fetch it up from the nether world, if it once gets down there. When a Buryat shaman is called in to attend a patient, the first thing he does is to ascertain where exactly the soul of the invalid is; for it may have strayed, or been stolen, or be languishing in the prison of the gloomy Erlik, lord of the world below. If it is anywhere in the neighbourhood, the shaman soon catches and replaces it in the patient’s body. If it is far away, he searches the wide world till he finds it, ransacking the deep woods, the lonely steppes, and the bottom of the sea, not to be thrown off the scent even though the cunning soul runs to the sheep-walks in the hope that its footprints will be lost among the tracks of the sheep. But when the whole world has been searched in vain for the errant soul, the shaman knows that there is nothing for it but to go down to hell and seek the lost one among the spirits in prison. At the stern call of duty he does not flinch, though he knows that the journey is toilsome, and that the travelling expenses, which are naturally defrayed by the patient, are very heavy. Sometimes the lord of the infernal regions will only agree to release the soul on condition of receiving another in its stead, and that one the soul of the sick man’s dearest friend. If the patient consents to the substitution, the shaman turns himself into a hawk, pounces upon the soul of the friend as it soars from his slumbering body in the form of a lark, and hands over the fluttering, struggling thing to the grim warden of the dead, who thereupon sets the soul of the sick man at liberty. So the sick man recovers and his friend dies.(190)