The cover of a U.S. Navy Aviator's Flight Log Book (form NAVAER-4111), the official record used to document a naval aviator's flight hours, aircraft, and missions. This particular log belonged to Ensign W.E. Bancroft, whose spine-stamped name and rank mark the beginning of a career that would later include service as a Lieutenant during the Korean War. Flight logbooks like this one provide a detailed, chronological record of an aviator's training and operational flying career. Project: 218132