In one entry in the Stationer’s Register of Stationer’s Company of London, a Society established in 1403 with a monopoly on the publishing industry, Shakespeare, as well as John Fletcher, Shakespeare’s associate, is credited with the authorship of the play “Cardenio” staged by the King’s Men in 1613.

Professor Brean Hammond of the University of Nottingham claims that in the play “Double Falsehood” by Lewis Theobald, who admitted he wrote it based on a lost manuscript of Shakespeare’s play “Cardenio,” Shakespeare’s style can be recognized in the first two acts and two scenes of Act III.