Santobono, whose features had become motionless and impenetrable, made no reply. But Prada nodded, and the conversation was henceforth confined to him and the young priest. "Why, yes, poison," he replied. "The fear of it has remained very great in Rome. Whenever a death seems inexplicable, either by reason of its suddenness or the tragic circumstances which attend it, the unanimous thought is poison. And remark this: in no city, I believe, are sudden deaths so frequent. The causes I don't exactly know, but some doctors put everything down to the fevers. Among the people, however, the one thought is poison, poison with all its legends, poison which kills like lightning and leaves no trace, the famous recipe bequeathed from age to age, through the emperors and the popes, down to these present times of middle-class democracy." As he spoke he ended by smiling, for he was inclined to be somewhat sceptical on the point, despite the covert terror with which he was inspired by racial and educational causes. However, he quoted instances. The Roman matrons had rid themselves of their husbands and lovers by employing the venom of red toads. Locusta, in a more practical spirit, sought poison in plants, one of which, probably aconite, she was wont to boil. Then, long afterwards, came the age of the Borgias, and subsequently, at Naples, La Toffana sold a famous water, doubtless some preparation of arsenic, in phials decorated with a representation of St. Nicholas of Bari. There were also extraordinary stories of pins, a prick from which killed one like lightning, of cups of wine poisoned by the infusion of rose petals, of woodcocks cut in half with prepared knives, which poisoned but one-half of the bird, so that he who partook of that half was killed. "I myself, in my younger days," continued Prada, "had a friend whose bride fell dead in church during the marriage service through simply inhaling a bouquet of flowers. And so isn't it possible that the famous recipe may really have been handed down, and have remained known to a few adepts?" "But chemistry has made too much progress," Pierre replied. "If mysterious poisons were believed in by the ancients and remained undetected in their time it was because there were no means of analysis. But the drug of the Borgias would now lead the simpleton who might employ it straight to the Assizes. Such stories are mere nonsense, and at the present day people scarcely tolerate them in newspaper serials and shockers." "Perhaps so," resumed the Count with his uneasy smile. "You are right, no doubt--only go and tell that to your host, for instance, Cardinal Boccanera, who last summer held in his arms an old and deeply-loved friend, Monsignor Gallo, who died after a seizure of a couple of hours." "But apoplexy may kill one in two hours, and aneurism only takes two minutes."