Baldwin, William. A Mirror for Magistrates (1559)

Hall, Edward. The Union of the Two Noble and Illustrate Families of Lancaster and York (1548).

Holinshed, Raphael. The Chronicles of England, Scotland and Ireland (1577). 1587 edtn.

More, Thomas. History of Richard III (pr. 1557). Read via the extracts in Hall and Holinshed.

(perhaps) Reynoldes, Richard. The Foundation of Rhetoric (1563). 'King Richard III, the Cruel Tyrant.'

True Tragedy of Richard III, The (perf. 1591).

REFERENCE : John Jowett, ed. Richard III. Oxford: Oxford University Press, 2000. 10-32.