This ambulatory form of epilepsy is very common amongst lads of fourteen or fifteen. Scarcely a week passes without the police receiving information from parents that their son has disappeared from home with only a few pence in his pocket. The wanderer is discovered later, frequently in some small provincial town, which he has reached after tramping aimlessly for days, sleeping in barns, and living on charity. When questioned, the boy usually displays total ignorance regarding all that has happened to him during the interval. Dr. Maccabruni in his _Notes on Hidden Forms of Epilepsy_, 1886, narrates the case of an epileptic, who during childhood received an injury to his skull. Later, he started out on a series of wanderings to Venice, Padua, Rome, Milan, Monaco, and Mentone. His journeys, especially those to distant parts, were undertaken in a state of unconsciousness and generally a short time before the commencement of a fit. These attacks may last any length of time, from a few minutes to several months. In one of the cases observed by my father, the attack lasted a fortnight. The patient, a young officer with whom we were personally acquainted, was one of the quietest persons possible, but suddenly he was seized with a mania for writing innumerable letters, especially on stamped paper, in exaggeratedly large writing very different from his usual style. These letters, which were full of absurdities, were posted by the writer from the different towns he passed through on his aimless journeyings, which lasted a whole fortnight. During one of these seizures, he was arrested as a deserter and was unable to give any explanation of his conduct. In this particular patient, the disease assumed the mild form of absurd letters and still more absurd journeys, but other individuals in the same state may commit criminal acts like homicide, equally without reason or gain to themselves. Once the fit is passed, these unfortunate individuals have generally no recollection of their past actions, and since in their normal state they are quiet, law-abiding persons, it is extremely difficult to trace back the deed to the right source, or to discover the disease, because they show no other symptoms of epilepsy, apart from the particular criminal act.