Pope Calixtus III to Ladislas: “How,” he asks, “can the French, the Spaniards, and the English think of sending armies against the Turks [Muslims] when you, who are near at hand, and whose interests are at stake, seem to take no heed of the danger which threatens you from the infidels?” (Calixtus III. to Ladislas. Æn. Sylv., Opp., 819-820.)