...What perfidy, methodically carried out after long years of preparation! The accounts of the sackings, fires and butcheries made him turn pale and gnash his teeth... 
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
..."Back, felon, traitor, back!" exclaimed Rodrigo, indignantat the perfidy of the count...
Antonio de Trueba Henry J. Gill 「The Cid Campeador」
...He defended Louise against Raoul, and justified her perfidy by her love...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
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