Of discoveries by conjecture we have an instance in the conspiracy of Piso against Nero; for Scaevinus, one of the conspirators, the day before he was to kill Nero, made his will, liberated all his slaves and gave them money, and bade Milichus, his freedman, sharpen his old rusty dagger, and have bandages ready for binding up wounds. From all which preparations Milichus conjecturing what work was in hand, accused Scaevinus before Nero; whereupon Scaevinus was arrested, and with him Natalis, another of the conspirators, who the day before had been seen to speak with him for a long time in private; and when the two differed in their account of what then passed between them, they were put to the torture and forced to confess the truth. In this way the conspiracy was brought to light, to the ruin of all concerned. Against these causes of the discovery of conspiracies it is impossible so to guard as that either through treachery, want of caution, or levity, the secret shall not be found out, whenever more than three or four persons are privy to it. And whenever more than one conspirator is arrested, the plot is certain to be detected, because no two persons can perfectly agree in a false account of what has passed between them. If only one be taken, should he be a man of resolute courage, he may refuse to implicate his comrades; but they on their part must have no less courage, to stay quiet where they are, and not betray themselves by flight; for if courage be absent anywhere, whether in him who is taken or in those still at large, the conspiracy is revealed. And what is related by Titus Livius as having happened in the conspiracy against Hieronymus, tyrant of Syracuse, is most extraordinary, namely, that on the capture of one of the conspirators, named Theodorus, he, with great fortitude, withheld the names of all his accomplices, and accused friends of the tyrant; while his companions, on their part, trusted so completely in his courage, that not one of them quitted Syracuse or showed any sign of fear.