There was no literary achievement of Shakspeare at all ,
prior to Marlowe's (alleged) death.
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High-ranking Shakespeare expert Prof. Stanley Wells said in a Video-interview of Mike Rubbo's Documentary(2003) "Much Ado about Something" (at Minute:28:00) about Marlowe :
"If Shakespeare had died at the age that Marlowe died, [end of May 1593] I think we should now regard Marlowe as the greater dramatist.!
The achievement of Marlowe by 1593, both born in the same year, by the time of the death of Marlowe, was greater, I think, than that of Shakespeare by that age."
"Marlowe has a string of great Plays: Faustus, Edward II, 2 parts of Tamburlaine, The Jew of Malta, Marlowe's Poem Hero and Leander, a lot of good translations as well.
He was a rapid developer, so far , one might say....."
Is Stanley Wells aware of his unlogic ?
Be aware there does not exist a single reliable source whatsoever of any literary achievement of Shakespeare by the time of Marlowe's death? (in Shakspere and Marlowe's 30th year of life!!)
How the achievement of Marlowe then could be greater in 1593?