KANSAS CITY (REUTERS).- Nearly 209 years after her death Martha Washington, the wife of the first U.S. president, is all the talk in Concordia, Kansas. People are flocking to a history museum in Concordia to see an apparently authentic Washington-written letter discovered in the bottom of a file cabinet drawer at the museum. More than 200 people, including several descendants of George and Martha Washington, attended an unveiling of the letter last Saturday. All this week, schools have brought students to see it at the Cloud County Historical Society Museum, said interim co-director Aline Luecke. “People can hardly believe a letter like this has lasted 200 years and it’s here in Concordia, Kansas,” Luecke said. “It’s been a very favorable reaction.” Concordia is a town of 5,700 people in north-central rural Kansas. The letter, postmarked Philadelphia and dated January 27, 1793 during Washington’s presidency, was found in a clear plastic