 Other researchers conclude that Drury's book was based partially on the work of Flacourt and others, but primarily on the journal of John Benbow, fellow sailor on the "Degrave" and son of Admiral Benbow.Benbow escaped to Fort Dauphin and sailed home aboard a Dutch ship; a few other Degrave survivors were picked up by pirate John Halsey.Benbow penned a journal of his experiences, which was lost in a 1714 fire but may have been seen by Defoe.