Human beings, on the other hand, were liable to be attacked by tatane, more particularly at night, when there was risk, not only to their bodies, but also to their own spirits,[51] which were at large while they slept. It is still firmly believed that in dreams the soul visits any locality present to the thought. On one of the ahu is a rough erection of slabs, said to be the house of the aku-aku Mata-wara-wara, or “Strong-Rain.” He had as a partner another aku-aku called Papai-a-taki-vera, and they arranged between them that Mata should bring on rain, while Papai constructed a house of reeds which was only there at night; then when the spirits of sleeping people, which were wandering abroad, became cold with the rain, they went into the house and the tatane killed them. The unfortunate sleeper waked in the morning feeling distinctly unwell, he lingered on for two or three days, and then died. It was not essential to life to have a soul, but you could not really get on comfortably without it. No knowledge survives of any belief or ideas with regard to a future state. The spirit, it was said, appeared occasionally for five or ten years after a man’s death and then vanished. Pan in the shape of tatane is by no means dead. Not only do such beings haunt the crater of Rano Raraku, but tales are told of weird apparitions at dusk which vanish mysteriously into space. There were no priests, but certain men, known as “koremaké,” practised spells which would secure the death of an enemy, and there was also the class known as “ivi-atua,” which included both men and women. The most important of these ivi-atua, of whom it was said there might be perhaps ten in the island, held commune with the aku-aku, others were able to prophesy, and could foresee the whereabouts of fish or turtle, while some had the gift of seeing hidden things, and would demand contributions from a secreted store of bananas or potatoes, in a way which was very disconcerting to the owner.