A soldier, 29 (father alcoholic, died in hospital for the insane), a decorative painter without plumbic history, non-alcoholic, non-syphilitic, was wounded once, September, 1914, but returned to the front in 1915. May, 1915, a shell burst near him. He lost consciousness, regained it a few days later at Brest, and was so far recovered that he could go on leave in seven days. While on leave, he had short attacks of delirium, followed by a total amnesia; there was, however, no crisis, fall, or convulsion. After the first attack, he had for 24 hours malaise and headache, but got well and went back to his dépôt. Shortly afterward more attacks of this sort recurred, and he went to hospital and thence to the neurological centre at Tours. Whence, August 9, 1915, he got a two-months’ leave for “mental disorder post-confusional, _second état_, probably hysterical (_commotio cerebri_), and organic hemiparesis.” November, 1915, after returning to the dépôt, there were more spells and he went again to hospital. Invalided December, 1915, he passed a year at home, but the spells continued. Although the epileptic nature of these attacks was maintained by Francais at Évreux, he was placed in the auxiliaries, December, 1916, but had to go to hospital almost at once, and, February 28, 1917, entered the neurological centre of the 9th Region for the second time. Here, when called to be examined two days after admission, he was observed in an attack. He suddenly rose from the bench, made a few steps, seemed to be listening and anxious, as if he ought to be on guard. He looked up, seemed to be looking for something whose noise was approaching, lowered his head, made a slight jerking movement, and said, “Poum!” as if to express the noise of an explosion. He took a few more steps, the same movements were repeated, and the same “Poum!” was uttered. This lasted for about a quarter of an hour, during which the patient was unaware of his surroundings. He could be guided all about the hall without resistance, but did not respond to orders, commands, noises, or contact. In short, the patient was in the midst of a hallucinatory dream at his post in the trenches, undergoing a bombardment. He was placed in a chair; remained motionless for a few seconds, woke up, and answered questions. “Where am I? Oh, yes; I must have been sick because my head feels bad.” In answer to the question. “What did you see; what was there?”, he said, “I don’t remember anything. I never remember. I don’t know.” The patient was dull and weak after the spell. These spells varied in number but occurred once a week. The patient was able to tell of certain attacks that had occurred while he was out of doors at home. Now and then, there was another theme in the hallucinatory delirium, namely, a pencil drawing of a woman’s picture, of no great artistic worth but carefully done, at which the patient was much astonished on awaking.