These registers were created by the Health and Home Affairs / Health Department to record correspondence relating to institutions, other than hospitals, as it was received. Each register is divided into broad subject headings with subheadings within each subject (for example, blind, epileptic, inebriates, mental or psychiatric, Aboriginal institutions, police, fire brigade, state children, prisons, homes for the aged, benevolent societies, maternal and child welfare, QCWA hostels, etc.). Sub-headings may include staff and residents, but subject headings can change from register to register.
From 1962 - 1968 the Prisons Department was administered by the Health and Home Affairs / Health Department, and the Prisons Department letters received were registered in this series, but the controlled Prisons Department correspondence for this period is not held by Queensland State Archives.
Each entry in a register gives the number of the letter, the number of any previous or subsequent correspondence, the date of the letter and of its registration, the author and subject of the letter and the action taken. As a top numbering system is used, it is necessary to use the registers to trace the sequence of numbers until the final number is reached. Where final action is given as "Away" see series entitled "General correspondence"; where final action is given as "Away B" or "Away Batch" see series entitled "Special batches".