Appointment of Admiral Leahy as Chief of Staff to the Commander in Chief
My dear Admiral:
In calling you to active duty as Chief of Staff to the Commander in Chief of the United States Army and Navy, I accept your resignation as Ambassador to France.
In so doing I want you to know first of all of my great satisfaction in the way in which you have carried out an extremely difficult task at an extremely difficult time and, second, that there has been such good agreement in our national policy in respect to France during your Ambassadorship. In the words of the Navy—"well done."
Always sincerely your friend,
Franklin D. Roosevelt
Franklin D. Roosevelt, Appointment of Admiral Leahy as Chief of Staff to the Commander in Chief Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/210759