"Of an especial magical importance are cures, during which the witch-doctor inhales hakúdufha. This is a magical snuff used exclusively by witch-doctors and prepared from the bark of a certain tree which, pounded up, is boiled in a small earthenware pot, until all the water has evaporated, and a sediment remains at the bottom of the pot. This sediment is toasted in the pot over a slight fire and is then finely powdered with the blade of a knife. Then the sorcerer blows a little of the powder through a reed...into the air. Next, he snuff, s, whilst, with the same reed, he absorbs the powder into each nostril successively. The hakudúfha obviously has a strongly stimulating effect, for immediately the witch-doctor begins singing and yelling wildly, all the while pitching the upper part of his body backwards and forwards."