Plutarch. The Lives of the Noble Grecians and Romans. Trans. Thomas North (1595). 'Julius Caesar', 'Pompey' and 'Cato Minor.'

Plutarch. Moralia.

REFERENCE : Thomas Marc Parrot, ed. The Plays of George Chapman: The Tragedies. 2 vols. London: Routlege and Kegan Paul, 1910-14. 2.657-8.