Percy and Vreni Mark worked with Dr. Schweitzer at Lambaréné in the early 60s. In 1963, Schweitzer blessed their engagement. Percy is the former chairman of the charity Reverence for Life UK (RfLUK). Vreni was Directrice of Maison Schweitzer in Günsbach (1987-89), and she now spends much of her time working alongside Percy and RfLUK to realise the aim of making Schweitzer’s ethical values and ideals
accessible to all.