RNM286386 \'Careless Talk Costs Lives and Ships\', WWII poster, c.1939 (colour litho) by English School, (20th century); National Museum of the Royal Navy, Portsmouth, Hampshire, UK; (add.info.: warning of danger of revealing military secrets; public information notice; Second World War; Navy officer with his daughter; admiralty telegram recording him missing in action;); English, out of copyright.