John Bond, In the Pillory: The Tale of the Borgia Pope… (1929)
“ Their skill and knowledge of the terrible art died with them; they have left to history the name of their dreaded poison, "cantarella," but the secret of its preparation and the manner of its use are buried with them. Modern science has evolved toxicology, a special knowledge of poisons, but the "cantarella" of the Borgia Pope has baffled even the experts in toxicology. We can only guess at its composition by the symptoms of its victims. ”
