Frimley Sanatorium, established in 1905, was the country outpost of the Brompton Hospital for Consumption and Diseases of the Chest. Its purpose was to provide a healthy environment for patients who were deemed capable of making a good recovery from TB. After a few years it was realised that follow-up records were vital for understanding the impact of the changing treatment regimes at Frimley. It fell to the Lady Almoner at the Brompton Hospital to persuade patients to keep in touch with the hospital after they were discharged.
Miss Lily Constance Marx, appointed in 1920, took this duty very seriously. She maintained contact with hundreds of patients through the course of her long career.