 In fact, he had determined to replace Sinclair with MI5 director-general Dick White before the incident.Eden told MPs it was not in the public interest to disclose the circumstances in which the frogman met his end.A little less than 14 months after Crabb's disappearance, on 9 June 1957, a body in a diving suit was brought to the surface in their net by two fishermen off Pilsey Island in Chichester Harbour.