Schweinfurth, the African explorer, tells us that, at the present day, among the Bongos and the Niam-Niams, woods and forests are regarded with awe as weird and mysterious places, the abodes of supernatural beings. The malignant spirits who are believed to inhabit the dark and gloomy forests, and who inspire the Bongos with extraordinary terror, have, like the Devil, wizards, and witches, a distinctive name: they are called _bitâbohs_; whilst the sylvan spirits inhabiting groves and woods are known as _rangas_. Under this last designation are comprised owls of different species, bats, and the _ndorr_, a small ape, with large red eyes and erect ears, which shuns the light of day, and hides itself in the trunks of trees, from whence it comes forth at night. As a protection against the influence of these malignant spirits of the woods, the Bongos have recourse to certain magical roots which are sold to them by their medicine-men. According to those worthies no one can enter into communication with the wood spirits except by means of certain roots, which enable the possessor to exorcise evil spirits, or give him the power of casting spells. All old people, but especially women, are suspected of having relations, more or less intimate, with the sylvan spirits, and of consulting the malign demons of the woods when they wish to injure any of their neighbours. This belief in evil spirits, which is general among the Bongos and other tribes of Africa, exists also among the Niam-Niams. For the latter, the forest is the abode of invisible beings who are constantly conspiring to injure man; and in the rustling of the foliage they imagine they hear the mysterious dialogues of the ghostly inhabitants of the woods. The ancient German race, in whom there existed a deep reverence for trees, peopled their groves and forests with a whole troup of _Waldgeister_, both beneficent and malevolent. A striking example is to be seen in the case of the Elder, in which dwells the _Hylde-moer_ (Elder-mother), or _Hylde-vinde_ (Elder-queen), who avenges all injuries done to the Elder-tree. On this account Elder branches may not be cut until permission has been asked of the _Hylde-moer_. In Lower Saxony the woodman will, on his bended knee, ask permission of the Elder-tree before cutting it, in these words: “Lady Elder, give me some of thy wood; then will I give thee, also, some of mine when it grows in the forest.” This formula is repeated three times.