About a year ago the school authorities in N. asked me to give a professional opinion as to the mental condition of Marie X., a thirteen year old schoolgirl. Marie had been expelled from school because she had been instrumental in originating an ugly rumour, spreading gossip about her class-teacher. The punishment hit the child, and especially her parents, very hard, so that the school authorities were inclined to readmit her if protected by a medical opinion. The facts were as follows:-- The teacher had heard indirectly that the girls were attributing some equivocal sexual story to him. On investigation it was found that Marie X. had one day related a dream to three girl-friends which ran somewhat as follows:-- "The class was going to the swimming-baths. I had to go to the boys' because there was no more room. Then we swam a long way out in the lake (asked 'who did so': 'Lina P., the teacher, and myself'). A steamer came along. The teacher asked us if we wished to get into it. We came to K. A wedding was just going on there (asked 'whose': 'a friend of the teacher's'). We were also to take part in it. Then we went for a journey (who? 'I, Lina P., and the teacher'). It was like a honeymoon journey. We came to Andermatt, and there was no more room in the hotel, so we were obliged to pass the night in a barn. The woman got a child there, and the teacher became the godfather." When I examined the child she told this dream. The teacher had likewise related the dream in writing. In this earlier version the obvious blanks after the word "steamer" in the above text were filled up as follows: "We got up. Soon we felt cold. An old man gave us a blouse which the teacher put on." On the other hand, there was an omission of the passage about finding no room in the hotel and being obliged to pass the night in the barn.