A General History of the Robberies and Murders of the most notorious Pyrates is a 1724 book published in Britain containing biographies of contemporary pirates, which was influential in shaping popular conceptions of pirates. Its author uses the name Captain Charles Johnson, generally considered a pseudonym for one of London's writer-publishers. The prime source for the biographies of many well known pirates, the book gives an almost mythical status to the more colourful characters, and it is likely that the author used considerable licence in his accounts of pirate conversations. The book also contains the name of the pirate flag the Jolly Roger, and shows the skull and bones design.