Sorry...no...I should have been more clear. It's a copy of a letter written by FDR as Asst SECNAV to all Naval aviators. It serves as a forward to the book.
Cheers,
Michael
PS I do, however, have a letter written and signed by J. Edgar Hoover to my mother explaining to her why he couldn't send an FBI agent to speak to her girl scout troop. No, I'm not making this up.