They dismissed the Mary Deare as "a piece of leaking ironmongery taken off the junk heap". For forty years, this 6,000-ton freighter had tramped the seas, suffered shipwreck twice, and been torpedoed three times in two world wars. Then one March night, battered, bruised, and empty, she emerged from severe Biscay gales into the English Channel -- and into the newspaper headlines. Here was a ship of mystery and tragedy...in one of the greatest sea…