These seven letters, which span the period between Truman’s final days as president in January 1953 and the domestic and international turmoil of the early 1960s, reveal an unknown personal side to Truman. The letters were all written to Dean Acheson, Truman’s trusted Secretary of State. The two developed a close friendship during their White House years, and maintained a regular correspondence during Truman’s post-presidential years. In May 1971, more than eighteen years and scores of letters later, Acheson wrote his final letter to Truman, wishing his friend a happy eighty-seventh birthday. Truman would pass away the following year.