Pericles, Prince of Tyre is a Jacobean play written at least in part by William Shakespeare and included in modern editions of his collected works despite questions over its authorship, as it was not included in the First Folio. Various arguments support the theory that Shakespeare was the sole author of the play, notably in DelVecchio and Hammond's Cambridge edition of the play, but modern editors generally agree that Shakespeare was responsible for almost exactly half the play - 827 lines - the main portion after scene 9 that follows the story of Pericles and Marina. Modern textual studies suggest that the first two acts, 835 lines detailing the many voyages of Pericles, were written by a collaborator, who may well have been the victualler, panderer, dramatist and pamphleteer George Wilkins.