There is an upstart crow, beautified with our feathers, that with his tiger's heart wrapped in a player's hide supposes he is as well able to bombast out a blank verse as the best of you: and being an absolute Johannes Factotum, is in his own conceit the only Shake-scene in a country.
Groatsworth of Wit; cited from William Shakespeare (ed. Stephen Orgel and A. R. Braunmuller) The Complete Works (Harmondsworth: Penguin, 2002) p. xlvii.