Roman religion, too, in some of its rites provided means for the periodical expulsion of hungry and hostile spirits of the dead, and for their pacification by the offer of food.

A tomb and its adjuncts were meant not merely for the honour of the dead, but also for the protection of the living.

A clear line of distinction was drawn between satisfied and beneficent ghosts like the Manes, and the unsatisfied and hostile ghosts like the Lemures and Larvae.

To the Celtic mind, when its analytical powers had come to birth, and man was sufficiently self-conscious to reflect upon himself, the problem of his own nature pressed for some solution.

In these solutions the breath, the blood, the name, the head, and even the hair generally played a part, but these would not in themselves explain the mysterious phenomena of sleep, of dreams, of epilepsy, of madness, of disease, of man's shadow and his reflection, and of man's death.