There are many forms of the disease,--the frank epileptic convulsion in which patients fall down, are seized with certain convulsive movements, become pale and lose consciousness for a time and then come to with an intense feeling of weariness which usually prompts them to sleep for some hours--too familiar to need further description. There are forms of epilepsy, however, quite different from these. In some cases, the attacks occur only at night, and unless the patient happens to be watched for some reason, there may be no trace of their occurrence, except perhaps a sore tongue where it has been bitten, or an intense feeling of weariness and depression in the morning. In still other cases, the physical signs are lacking almost entirely. There may be only a momentary loss of consciousness. A distinguished professor of medicine in this country used to have a momentary attack of confusion, during which he lost the thread of his discourse, and always within a minute, with a somewhat flushed face, he was able to go on, though he had to begin with another idea. The so-called psychic epilepsy, in which the symptoms are entirely mental and consist of some marked change of disposition for a time, are now universally conceded as constituting well-marked phases of the disease. Curiously enough it is with regard to these obscure cases, uncomplicated by serious physical manifestations, that there is most mystery; and they seem to affect the mentality and to disturb volition and responsibility more than the supposedly severer forms which cause convulsive attacks and are so easy of recognition. Certain forms of masked or psychic epilepsy constitute the most puzzling problem that the expert in nervous and mental disease has to deal with where criminal acts are performed, apparently without sufficient motive, and yet where the limits of responsibility must if possible be determined. It is easy to dismiss these cases and to consider that because a certain amount of intelligence has been displayed in the performance of the act, and because the patient ordinarily understands perfectly the distinction between good and evil. {253} that therefore the will must have been entirely free in the accomplishment of the criminal action and the intellect must have understood what it was doing. As yet the general public refuses to take the standpoint of the expert in mental diseases in many of these cases; and only when clergymen also shall come to a realisation of the pathological elements undermining free will in these cases, that justice will be properly tempered, not by unworthy or misplaced charity, but by the mercy which, knowing all, has learned duly to appreciate what is and what is not criminal.