Even when a tree has been felled, sawn into planks, and used to build a house, it is possible that the woodland spirit may still be lurking in the timber, and accordingly some people seek to propitiate him before or after they occupy the new house. Hence, when a new dwelling is ready the Toradjas of Celebes kill a goat, a pig, or a buffalo, and smear all the woodwork with its blood. If the building is a _lobo_ or spirit-house, a fowl or a dog is killed on the ridge of the roof, and its blood allowed to flow down on both sides. The ruder Tonapoo in such a case sacrifice a human being on the roof. This sacrifice on the roof of a _lobo_ or temple serves the same purpose as the smearing of blood on the woodwork of an ordinary house. The intention is to propitiate the forest-spirits who may still be in the timber; they are thus put in good humour and will do the inmates of the house no harm. For a like reason people in Celebes and the Moluccas are much afraid of planting a post upside down at the building of a house; for the forest-spirit, who might still be in the timber, would very naturally resent the indignity and visit the inmates with sickness. The Kayans of Borneo are of opinion that tree-spirits stand very stiffly on the point of honour and visit men with their displeasure for any injury done to them. Hence after building a house, whereby they have been forced to ill-treat many trees, these people observe a period of penance for a year during which they must abstain from many things, such as the killing of bears, tiger-cats, and serpents. 2. Beneficent Powers of Tree-Spirits