In June, 1916, a portion of the Lord Derby War Hospital was set aside for the care and treatment of cases of mental disorder occurring in non-commissioned officers and men of the British Expeditionary Forces. In addition, it was found that at the home training camps, and in soldiers doing garrison duty in India, Gibraltar, Sierra Leone, and so on, numerous cases of mental disorder were from time to time arising. As it was obviously impossible for general hospitals adequately to care for such cases, the Lord Derby War Hospital, pending their final disposal, was called upon to receive a certain number of them. Other arrangements have now been made for more expeditiously dealing with these cases, and in consequence none such are now received in this hospital.