Royal governess Marion Crawford ('Crawfie', 1909 - 1998, right) accompanies Princesses Elizabeth (later Queen Elizabeth II, left) and Margaret (1930 - 2002) to a London Underground station, on their way to visit the headquarters of the YWCA (Young Women's Christian Association), off Tottenham Court Road, London, 15th May 1939. This will be the princesses' first ride on the Underground.