After the cessation of hostilities with Japan some 60,000 Europeans were released from Prisoners of War Camps in territory under Japanese control. Of these, a high proportion were sick and were admitted to hospital. Nearly all the psychiatric cases among them were admitted to the 41 British General Hospital, Hospital Town East, Jalahalli. These cases admitted to this hospital were 60 in number, and of them 50 were considered psychotic, 6 neurotic, and in 4 no gross psychiatric disability was found. In order, adequately, to assess the significance of this incidence of mental disorder in the prison camps, a brief résumé of the conditions of imprisonment and of the state of the cases admitted to general medical wards is considered essential.