Much of what we know about Captain Safford's contributions to naval cryptology come from his own writing.
A number of his personal letters provide insight into events surrounding the congressional investigation into the attack on Pearl Harbor. One letter refers specifically to the “Winds Message” reportedly intercepted by the U.S. days before the 7 December surprise attack. This infamous message reportedly gave clear indications of the planned Japanese surprise attack.
Unfortunately the actual intercept mysteriously disappeared shortly after the surprise attack and the "Winds Message's" very existence is only supported by the testimony of Safford and perhaps one or two others who reportedly also were aware of the intercept.
As Admiral Stavridis is so fond of saying: "Think, read, write and publish." If you don't tell your story - who will know it?