Absorbed in cover Princess Margaret and a Sister of Mercy in the midst of schoolchildren at Henle Thames, where to-day the Princes Planted the first tree of the new Avenue in the Fail Mile. Absorbed In Conversation, Princess Margaret and a Sister of Mercy talk in the midst of school children at Henley, Thames, where Princess Margaret planted the first tree in Fair Mile recently. October 16, 1953. (Photo by Daily Mail Contract Picture).