We have known mathematicians whose ghosts even appeared in the shape of coloured circles and squares, and Justus Martyr was haunted by the phantoms of flowers. Nay, our own Sir Joshua, after he had been painting portraits, sometimes believed the trees, and flowers, and posts to be men and women. I knew myself a bombardier, whose brain had been wounded in a battle. To this man a post was an enemy, and he would, when a sudden frenzy came on him, attack it in the street with his cane, and not leave it until he believed that his foeman was beaten or lay prostrate at his feet. Intense feeling, especially if combined with apprehension, often raises a phantom. The unhappy Sir R—— C——, on being summoned to attend the Princess Charlotte of Wales, saw her form robed in white distinctly glide along before him as he sat in his carriage: a parallel, nay, an _explanation_, to the interesting stories of Astrophel. Then the sting of conscience may warp a _common_ object thus. Theodric, the Gothic king, unjustly condemned and put to death Boëthius and Symmachus. It chanced at that time, that a large fish was served to him at dinner, when his imagination directly changed the fish’s head into the ghastly face of Symmachus, upbraiding him with the murder of innocence; and such was the effect of the phantom, that in a few days he died. But these spectral forms were seen, like the dagger of Macbeth, and the hand-writing on the wall, by none but the _conscience-stricken_, a proof of their being ideal and not real. Not long after the death of Byron, Sir Walter Scott was engaged in his study during the darkening twilight of an autumnal evening, in reading a sketch of his form and habits, his manners and opinions. On a sudden he saw as he laid down his book, and passed into his hall, the _eidōlon_ of his departed friend before him. He remained for some time impressed by the intensity of the illusion, which had thus created a phantom out of skins, and scarfs, and plaids, hanging on a screen in the gothic hall of Abbotsford. I learn from Doctor T. that a certain lady was on the eve of her marriage, but her lover was killed as he was on his way to join her. An acute fever immediately followed this impression; and on each subsequent day, when the same hour struck on the clock, she fell into a state of ecstacy, and believed that the phantom of her lover wafted her to the skies; then followed a swoon of two or three hours’ duration, and her diurnal recovery ensued.