Hitherto a difficulty in forming a just opinion as to the value of the colony treatment of epileptics has been the inability to keep trace of the patients after they have left the Colony. In connection with the Lingfield Colony (which has nearly 300 epileptic patients), an attempt has now been made to follow up, and obtain a report upon, those patients who have left the Colony during the last 4½ years. To this end a circular was sent to the different local authorities asking for their co-operation in this investigation, and thanks are due to them for their prompt response. The number of cases inquired into totalled 101. The number of reports actually received was 100, but 20 of these were blank, the patients having disappeared without leaving an address.