One of the secret weapons of World War II has been revealed! It is the humble prune. A London auction house, Spink, is selling two grizzled prunes that it says were destined to be stuffed with maps or other documents and smuggled to prisoners of war. The prunes were part of the memorabilia collection of a British spy. "They are very dry and hard and it's amazing that they have survived," said Emily Johnston, spokesperson for Spink. The prunes are part of a collection of World War II memorabilia collected by a British woman, the late Doreen Mulot, a former member of Britain's Special Operations Executive, which was set up to carry out operations behind enemy lines. Sometimes referred to as "the Baker Street Irregulars" after Sherlock Holmes' fictional group of spies. COMPILED BY NIMI KURIAN