I have also heard formidable raps with the two young girls, fourteen and fifteen years of age, who were called the Agen mediums. I observed these mediums at their own home, and I also had them twice at Bordeaux, when on each occasion they remained for nearly a month. The raps produced by them are interesting, but they do not seem to me to be demonstrative. One of these girls obtained raps on the floor under her feet; I verified the apparent immobility of the foot while the raps were being produced. When the two girls were in bed, loud raps were heard near their feet, seemingly given on the wood of their bed. We were able to observe the apparent immobility of the children. Raps were also given on the blankets; we could feel the vibrations when laying our hands on the blankets; the raps appeared to be produced under our hands. I have heard diverse noises with these children in obscurity, but I draw no conclusion therefrom. I found out that they were not always sincere, and that they had a tendency to take advantage of the confidence and friendliness of the people, with whom they were staying. They have simulated some of their phenomena, especially raps in the ceiling. I have never been able to persuade these young girls to experiment at a table with sufficient conditions of light. They were accustomed to go to bed in order to procure their raps. It is true I have heard these raps in daylight, but I consider other conditions were unsatisfactory on these occasions. I regretted exceedingly that these mediums showed so little good-will, for even putting aside the greater part of the suspicious phenomena they produced, there were still some which seemed to be worthy of further examination. I have touched upon my observation of these children because it is instructive, although it may be negative from my point of view. It shows the inconveniences of a bad method of development. I have noticed that psychical phenomena has a great tendency to repeat itself, to follow a certain routine: they tend to turn round the same axis. The children of whom I have just spoken had been allowed to acquire the habit of going to bed, in order to obtain the sonorous phenomena they appeared to produce. Therefore they were able to obtain them only under those conditions. They have never given me a ‘rap’ by means of a table, and yet, I am inclined to think that they, or at least that one of them, had the constitution necessary for the emission of psychic force. My failure with the Agen mediums was not altogether devoid of interest, for I gained experience, and experience is only acquired with time, patience, and multiplicity of observations. It is useful to be able to compare good, doubtful, and bad seances.