E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Prisoner of Chillon. Francois de Bonnivard, of Lunes. Lord &Bgrave;yron makes him one of six brothers, all of whom suffered as martyrs. The father and two sons died on the battlefield; one was burnt at the stake; three were incarcerated in the dungeon of Chillon, near the lake of Genevaof these, two died, and Francois was set at liberty by the Bearnais. Byron says that Bonnivard has left traces of his footsteps in the pavement of the dungeon. He was put in prison for republican principles by the Duke-Bishop of Savoy. (14961570.)