(M27) Now the absence of the soul in sleep has its dangers, for if from any cause the soul should be permanently detained away from the body, the person thus deprived of the vital principle must die.(125) There is a German belief that the soul escapes from a sleeper’s mouth in the form of a white mouse or a little bird, and that to prevent the return of the bird or animal would be fatal to the sleeper.(126) Hence in Transylvania they say that you should not let a child sleep with its mouth open, or its soul will slip out in the shape of a mouse, and the child will never wake.(127) Many causes may detain the sleeper’s soul. Thus, his soul may meet the soul of another sleeper and the two souls may fight; if a Guinea negro wakens with sore bones in the morning, he thinks that his soul has been thrashed by another soul in sleep.(128) Or it may meet the soul of a person just deceased and be carried off by it; hence in the Aru Islands the inmates of a house will not sleep the night after a death has taken place in it, because the soul of the deceased is supposed to be still in the house and they fear to meet it in a dream.(129) Similarly among the Upper Thompson Indians of British Columbia, the friends and neighbours who gathered in a house after a death and remained there till the burial was over were not allowed to sleep, lest their souls should be drawn away by the ghost of the deceased or by his guardian spirit.(130) The Lengua Indians of the Gran Chaco hold that the vagrant spirits of the dead may come to life again if only they can take possession of a sleeper’s body during the absence of his soul in dreams. Hence, when the shades of night have fallen, the ghosts of the departed gather round the villages, watching for a chance to pounce on the bodies of dreamers and to enter into them through the gateway of the breast.(131) Again, the soul of the sleeper may be prevented by an accident or by physical force from returning to his body. When a Dyak dreams of falling into the water, he supposes that this accident has really befallen his spirit, and he sends for a wizard, who fishes for the spirit with a hand-net in a basin of water till he catches it and restores it to its owner.(132) The Santals tell how a man fell asleep, and growing very thirsty, his soul, in the form of a lizard, left his body and entered a pitcher of water to drink. Just then the owner of the pitcher happened to cover it; so the soul could not return to the body and the man died. While his friends were preparing to burn the body some one uncovered the pitcher to get water. The lizard thus escaped and returned to the body, which immediately revived; so the man rose up and asked his friends why they were weeping. They told him they thought he was dead and were about to burn his body. He said he had been down a well to get water, but had found it hard to get out and had just returned. So they saw it all.(133) A similar story is reported from Transylvania as follows.