The series consists of patient case files for persons admitted to any of the facilities of the Mental Health Services between 1872 and 1987, including Essondale (later Riverview), Valleyview, Dellview, Skeenaview, Crease Clinic and Colquitz Provincial Mental Hospital for the Criminally Insane (Victoria).

The earliest files are slim, usually including only the doctor's certificates of commitment. The early files include persons who were admitted to the lunatic asylum as soon as it opened in Victoria, having previously been confined in the gaol.

A patient case file may include: a photograph or multiple photographs of the patient; certificate of examination of a patient's clothing and person on admission; admission details including diagnosis; medical reports and certificates; application for an order for admission of a patient or of a "lunatic" wandering at large; laboratory report; sleep and weight chart; clinical chart including observation of patient; clinical record; permission for therapy and treatment; correspondence; ward notes; records of family history, personal history, present illness, mental status and physical examination; visitor register; propensity slip; admission information to the Inspector of Municipalities; doctor's reports; statements and letters written by the patient; list of personal property; psychopathic history record (form filled in by next of kin); special discharge on probation; neuropsychiatric cases on release from hospital; Department of Soldiers' Civil Re-establishment medical history of an invalid form; Department of Soldiers' Civil Re-establishment medical report for engagement on re-treatment; certificate of registration of death; report of death to Provincial Secretary; notice of registration of death; autopsy; news clippings about the patient and a published obituary.

The series consists of admission registers for the provincial mental hospitals (1947-1971) and Crease Clinic (1951-1971), registers of persons denied admission to the mental hospitals (1952-1964), probation, discharge and death registers, supervisor daily report volumes (daily ward census, lists of persons admitted, discharged, transferred) (1953-1954; 1960-1967) and a record of operations and patients seen in consultation (for non-psychiatric conditions) (1951-1957).
The series also includes alphabetical indexes of various kinds which cover the period 1934-1966. These appear to have been created as indexes to current residents at various times. As the patients were discharged they were crossed off the lists in some cases