The Alexandra Institution for the Feebleminded was opened in 1921. It was situated on what was formerly the Nieuwe Molen Estate.
It was decided to erect a hospital on the site to replace the Old Somerset Hospital, and the foundation stone was laid on I3 January 1906 by HRH the Duke of Connaught. Owing to the delays that seem inevitable in the construction of any public building, it was not until 1914 that the buildings were ready for occupation. By that time, the First World War had broken out, and so it was taken over as a military hospital. After the war, the Government decided to open it as South Africa's first institution for mental defectives. Patients were admitted in July 1921.
The first group came from Valkenberg and the Pretoria Mental Hospital, and by September they numbered 153 (all of whom were white females). By the end of the year, the numbers had increased to 245, of whom 92 were males. It had its share of teething troubles, many of which arose because the buildings had not been constructed to house defectives; for example, the admission of males was considerably delayed because the doors had no locks. Despite such handicaps, the development of the institution progressed well, and the numbers of patients and staff increased rapidly. Owing to ignorance of the scope and purpose of the institution, many unsuitable patients were sent there in the early days and had to be returned to tile hospitals from which they had come.
One of the first developments was the opening of a school for the younger defectives. Specially trained teachers from abroad were engaged, and special emphasis was laid on the development of muscular co-ordination and manual skills, rather than on scholastic attainment. There was an early institution of occupational therapy for both sexes, and this was highly developed over the years. Among the activities available for males were boot making, tailoring, painting, upholstery, woodwork, building, and plumbing. The females did laundry, sew, and fancy-work.
A development from 1947 was that the high-grade defectives now did paid work for outside firms. It began with rug-fringing, but in 1949 patients began to make bags for a tobacco firm; they earned 4 shillings for 1 000 bags.
When the institution was opened in 1921, Dr HC Watson was the first medical superintendent. Dr Watson was succeeded in 1923 by Dr RA Forster, who remained in charge until 1940. In addition to its medical staff, it had several psychologists, and several graduate students in psychology, from the University of Cape Town were doing research and practical work there.