2779935 Suicide of the Austrian traitor Colonel Alfred Redl (colour litho) by French School, (20th century); Private Collection; (add.info.: Suicide of the Austrian traitor Colonel Alfred Redl. The head of Austrian counter-intelligence, Redl was in fact a Russian spy who provided the Russians with military secrets including the entire Austrian plan for the invasion of Serbia. He shot himself with a revolver after his treason was unveiled. It has been suggested that Redl\'s activities cost the lives of 500,000 Austro-Hungarian soldiers in the First World War. La trahison du Colonel Redl en Autriche. Comment le coupable s\'est suicide. Illustration for Le Petit Journal, 15 June 1913.); 穢 Look and Learn.