Sixtus.
The Catholick cause; or, The horrid practice of murdering kings, justified, and commended by the Pope, in a speech to his cardinals, upon the barbarous assassination of Henry the Third of France, who was stabb'd by Jaques Clement, a Dominican fryar. The true copy of which speech, both in Latin, and also faithfully rendred into English, you have in the following pages.
London: printed for Walter Kettilby at the Bishop's Head in S. Paul's Church-yard, 1678.
ESTC No. R21677.Grub Street ID 91638.