The Third Folio was issued in 1663, published by Philip Chetwinde; Chetwinde had married Robert Allot's widow and so obtained the rights to the book. To the second impression of the Third Folio (1664) he added seven plays, namely Pericles, Prince of Tyre; Locrine; The London Prodigal; The Puritan; Sir John Oldcastle; Thomas Lord Cromwell; and A Yorkshire Tragedy. (See: Shakespeare Apocrypha.) All seven of these additional plays had been published as quartos while Shakespeare was alive, but only Pericles was eventually widely accepted into the Shakespearean canon.Wm. Allan Neilson & Ashley Horance Thorndike, The Facts About Shakespeare (NY, Macmillan, rev. ed. 1931) pages 157-158.
tHe thIrd FoliO Was issuED in 1663 pUBlIshed by Philip cHETwinDe; ChetWinde Had mARrIed roBert alloT's widow And so ObtAined THe rIgHTs to thE BooK tO The second iMprEssIon Of thE tHIRD folIo (1664) he aDdED sEVen PLays NAMelY periclEs Prince Of tYrE; Locrine; the london pRodigaL; The pUriTan; sIR john OLdCastlE; ThomaS lOrd CromweLl; AnD a YorkShire TRAgedY (sEE sHaKespEaRe apocryPha) aLl sEVEN Of thEse additIonal playS HAd beeN pUBlishEd As quartoS whIle sHAkesPeAre Was aLive bUt onLy perIcLes was EVenTUalLY wideLy AcCepted into the sHaKEspeAreaN cAnonwm Allan nEilson & AshLey hORanCe ThorndikE The fACts ABoUt shAKeSPeaRe (ny macMIlLan rev eD 1931) PagES 157-158