Contents of the Collection The David F. Beyl and Donald D. Beyl log books is a small collection of nine (9) United States Naval Aviator and civilian pilot logbooks belonging to brothers David and Donald Beyl, ranging from 1943-1987. Four (4) of the logbooks belonged to David D. Beyl and span approximately from 1954 to 1978, covering David's US Navy service. The other five (5) logbooks belonged to his brother, Donald F. Beyl, and cover his military and civilian flight history, ranging from 1943-1987. ...