The growing early C20 awareness of the importance of hygiene and exercise reached its ultimate expression in the Peckham Experiment, founded in 1926 by social biologists George Scott Williamson and Innes Hope Pearse who wanted to make progress from the conditions described in Round About a Pound a Week. The Pioneer Health Centre (1935, Sir Owen Williams) is still there but is now housing. Its design embodied new ideas about light and ventilation, promotion of a healthy lifestyle, and the prevention rather than treatment of illness. Although it closed in 1950, its influence was vast and widespread.