Though the doctrine of Demons, or being possessed, has been discarded; yet, in my opinion, it deserves a more serious consideration than medical men imagine:—it involves the true theory of mind and matter, their connection with each other, and the principles on which this connection depends, and by which it is regulated. I shall leave this question for the present, with the intention of returning to it at some future opportunity. However, one thing this case serves to prove and illustrate, which is, that whatever mysterious link the mind may constitute in the order of being, it is certain that this is according to or dependant on the physical condition of the material organs through which this connection operates, so that the physical reasoning on disordered and diseased organization remains precisely the same, whether we admit or deny that the visible, and invisible world subsist together and are in indissoluble connection. _No._ 30.—_Admitted_ 1808.—_Aged_ 47. I have not been able to obtain a very accurate or full history of this old and incurable case. He was a clergyman of the Church of England. He had been a hard reader and distinguished student at Cambridge, and he now gives proof of his having been an excellent classic. It is said, that after he had obtained a small vicarage, although not an immoral man, he was gay and expensive in his habits. After the age of thirty, he hastily married an exceedingly beautiful girl of about sixteen years of age, but who was uneducated and from a low station of life. Afterwards discovering her deficiencies as a companion, his love cooled into indifference, and his naturally proud, impatient, and uncontrollable temper was made worse; he treated her harshly, their quarrels became habitual, and they lived in hatred, misery, and distraction together. In this state of his disappointed affections he was seduced into various intrigues. Shame, conscience, and loss of character, quarrels with his parishioners, aggravated at the same time by a fall from his horse on his head, increased his natural irratibility of temper, and so mortified his pride, that he became desperate and attempted suicide. After this he had a regular paroxysm of maniacal violence, which subsided, although it has returned with considerable increasing intervals up to this time. During his lucid intervals, he will talk of the harshness with which he was used, when it was first considered necessary to remove him from home; and there is no doubt there is some truth in his statements: at the same time it seems right to observe that, if in any instance it can be excusable to allow our natural feelings for a moment to overcome us, this was one of such cases. The proud, malignant, and contemptuous manner displayed in his violence, was irritating in the extreme.