Many of Shakespeare's plays were published in editions of varying quality and accuracy during his lifetime. However, in 1623, John Heminges and Henry Condell, two fellow actors and friends of Shakespeare's, published a more definitive text known as the First Folio, a posthumous collected edition of Shakespeare's dramatic works that includes 36 of his plays. Its Preface was a prescient poem by Ben Jonson, a former rival of Shakespeare, who hailed Shakespeare with the now famous epithet: "not of an age, but for all time".