From Dr. Conolly we learn the curious illusion of a student of anatomy, who, during his ardent devotion to his study, confidently believed that there was a town in his _deltoid_ muscle.
And, from Dr. Abercrombie, the case of a gentleman of high literary attainments, who, when closely reading in his study, was repeatedly annoyed by the intrusive visits of a little old woman in a black bonnet and mantle, with a basket on her arm. So _filmy_, however, was this phantom, that the door-lock was seen through her. Supposing she had mistaken her way, he politely showed her the door, and she instantly vanished. It was the change of posture which effected this disappearance, by altering the circulation of the brain-blood, then in a state of partial stagnation.
My friend, Dr. Johnson, has told me of a gentleman of great science, who conceived that he was honoured by the frequent visits of spectres. They were at first refined and elegant both in manners and in conversation, which, on one occasion, assumed a witty turn, and quips, and puns, and satire, were the order of the evening; so that he was charmed with his ghostly visitors, and sought no relief. On a sudden, however, they changed into demoniac fiends, uttering expressions of the most degraded and unholy nature. He became alarmed, and depletion soon cured him of his phantasy.
A Scotch lawyer had long laboured under this kind of monomania, which at length proved fatal. His physician had long seen that some secret grief was gnawing the heart and sucking the life-blood of his patient, and he at last extorted the confession, that a skeleton was ever watching him from the foot of his bed. The physician tried various modes to dispel the illusion, and once placed himself in the field of the vision, and was not a little terrified when the patient exclaimed, that he saw the skull peering at him over his left shoulder.
The “Martyr Philosopher,” too, in the “Diary of a Physician,” saw, shortly preceding his death, a figure in black deliberately putting away the books in his study, throwing his pens and ink into the fire, and folding up his telescope, as if they were now useless. The truth is _he himself_ had been engaged in that occupation, but it was his own disordered imagination that raised the spectre.