This knowledge of the future by the dead is to be found in more than one well-authenticated modern ghost story, where the apparition would seem to have manifested itself for the express purpose of warning those whom it has loved on earth of approaching danger. We may take, for instance, the story[63] where a wife, who is lying in bed with her husband, suddenly sees a gentleman dressed in full naval uniform sitting on the bed. She was too astonished for fear, and waked her husband, who "for a second or two lay looking in intense astonishment at the intruder; then, lifting himself a little, he shouted: 'What on earth are you doing here, sir?' Meanwhile the form, slowly drawing himself into an upright position, now said in a commanding, yet reproachful voice, 'Willie! Willie!' and then vanished." Her husband got up, unlocked the door, and searched the house, but found nothing. On his return he informed his wife that the form was that of his father, whom she had never seen. He had left the navy before this son was born, and the son had, therefore, only seen his father in uniform a very few times. It afterwards came out that her husband was about to engage in some speculations which, had he done so, would have proved his ruin; but, fortunately, this vision of his father made such an impression on him that he abandoned the idea altogether. Lucan[64] describes how Sextus Pompeius went to consult Erichtho, one of the famous Thessalian witches, as to the prospects of his father's success against Caesar, during the campaign that ended in the disastrous defeat at Pharsalia. It is decided that a dead man must be called back to life, and Erichtho goes out to where a recent skirmish has taken place, and chooses the body of a man whose throat had been cut, which was lying there unburied. She drags it back to her cave, and fills its breast with warm blood. She has chosen a man recently dead, because his words are more likely to be clear and distinct, which might not be the case with one long accustomed to the world below. She then washes it, uses various magic herbs and potions, and prays to the gods of the lower world. At last she sees the shade of the man, whose lifeless body lies stretched before her, standing close by and gazing upon the limbs it had left and the hated bonds of its former prison. Furious at the delay and the slow working of her spells, she seizes a live serpent and lashes the corpse with it. Even the last boon of death, the power of dying, is denied the poor wretch. Slowly the life returns to the body, and Erichtho promises that if the man speaks the truth she will bury him so effectually that no spells will ever be able to call him back to life again. He is weak and faint, like a dying man, but finally tells her all she wishes to know, and dies once again. She fulfills her promise and burns the body, using every kind of magic spell to make it impossible for anyone to trouble the shade again. Indeed, it seems to have been