Higgins, John. The Mirror for Magistrates (1574).

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

Spenser, Edmund. The Faerie Queene (1590). 2.10.

Warner, William. Albion's England (verse, 1586).

REFERENCE : Donald M. Michie, ed. A Critical Edition of 'The True Chronicle History of King Leir and His Three Daughters, Gonorill, Ragan and Cordella'. New York: Garland, 1991. 18-21.