I WOULD LIKE to take this opportunity to thank the staff of the Truman Library, and, in particular, the director, Benedict K. Zobrist, for their cheerful and repeated assistance. Rose Conway, who served my father so well as his secretary during the White House years, has been equally helpful in guiding me through his voluminous personal files. I would also like to thank ex-members of the Truman White House staff, in particular George Elsey, Charles Murphy, Donald Dawson, Clark Clifford, Major General Harry Vaughan, and Matt Connelly, for sharing their recollections of the Truman years with me. Others to whom I owe debts of gratitude are James Farley, who shared some hitherto unrevealed recollections of the Roosevelt years with me, and John Snyder, my father’s Secretary of the Treasury as well as one of our closest family friends. The staff of the Roosevelt Library gathered together on microfilm a number of documents from the 1930s and early 1940s which shed new light on my father’s career. Finally, I must especially thank historian Thomas Fleming for his invaluable advice and help in researching and organizing this book.