It is to be regarded merely as an isolated case to be classed with a more richly developed set of demon-ideas that dominate the daily life of primitive man. At this stage, these ideas are the only elements of an incipient mythology that are clearly discernible and that at the same time exercise an important influence upon life. In so far as the mythology of primitive man gains a permanent foothold and influence, it consists of a _belief in magic and demons_. There are, however, two motives which engender this belief and give form and colour to the ideas and emotions springing from them. These are _death_ and _sickness_. Death! There are doubtless few impressions that have so powerful an effect upon the man of nature; indeed, civilized man as well is still very greatly stirred by the phenomenon of death. Let his companion meet with death, and even the outward actions of a primitive man are significant. The moment a person dies, the immediate impulse of primitive man is to leave him lying where he is and to flee. The dead person is abandoned, and the place where he died continues to be avoided for a long time--if possible, until animals have devoured the corpse. Obviously the emotion of _fear_ is regnant. Its immediate cause is apparently the unusual and fear-inspiring changes which death makes in the appearance of a man. The suspension of movements, the pallor of death, the sudden cessation of breathing--these are phenomena sufficient to cause the most extreme terror. But what is the nature of the ideas that associate themselves with this fearsome impression? The flight from the corpse is evidence that man's fears are primarily for himself. To tarry in the presence of a dead person exposes the living man to the danger of being himself overtaken by death. The source of this danger is evidently identical with that which has brought death to the recently deceased person himself. Primitive man cannot think of death except as the sudden departure from the dying person of that which originally brought life. Nevertheless, there is evidently bound up with this conception the further idea that powers of life are still resident in the body; the latter remains firmly associated in the mind of primitive man with the impression of life. Here, then, we have the original source of the contradictory idea of a something that generates life and is therefore independent of the body, while nevertheless being connected with it. So far as we can gain knowledge of the impression which death makes on the mind of primitive man, two disparate motives are indissolubly united. He regards life as something that, in part, continues in some mysterious manner to dwell within the corpse, and, in part, hovers about, invisible, in its vicinity. For this reason, the dead person becomes to him a _demon_, an invisible being capable of seizing upon man, of overpowering or killing him, or of bringing sickness upon him. In addition to this primitive idea of demons, we