Many of Shakespeare's contemporaries are still remembered as great dramatists in their own right, like Christopher Marlowe (Doctor Faustus, The Jew of Malta, Edward II, Tamerlane). Some of Shakespeare's plays are often seen as "responses" to plays by Marlowe on similar subjects. There was Ben Jonson, who wrote Every Man in His Humor and The Alchemist. Jonson knew Shakespeare personally, and while not above poking fun at aspects of Shakespeare's work in print, after Shakespeare's death he wrote, "He was not of an age but for all time!" (Perhaps it was a bit early to declare that, but I think history has confirmed the assessment.) John Fletcher, in addition to the plays he wrote by himself and with Francis Beaumont, collaborated with Shakespeare on Henry VIII, Cardenio, and The Two Noble Kinsmen. Thomas Kyd wrote The Spanish Tragedy, and some people think he also wrote a play based on the legend of Hamlet before Shakespeare did (others disagree).