An elderly couple who found secret World War II German-coded messages under their floorboards are trying to crack the puzzle with the help of a neighbor—a 95-year-old Bletchley Park code breaker. During a renovation project, John and Val Campbell, of Guernsey, discovered a cache of wartime items hidden in their house by a German soldier in the 1940s. The stash included cigarette packets, matches, a shampoo sachet, a fuse wire pack, throat pastilles—and even brothel passes. But there was also an envelope addressed to Ernst Buchtela and pieces of mice-bitten paper, covered in German code. The couple realized they were left by a German soldier who was billeted in the home in occupied Guernsey during the war. “We put it in a box to get on with the project. Then during the lockdown, when we wondered what to do with ourselves, I remembered the sheet of coding and thought before I die I should …