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.
All these dangers, therefore, which attend the contrivance of a plot, must be passed through before you come to its execution; or if you would escape them, you must observe the following precautions: Your first and surest, nay, to say truth, your only safeguard, is to leave your accomplices no time to accuse you; for which reason you must impart the affair to them, only at the moment when you mean it to be carried out, and not before. Those who have followed this course have wholly escaped the preliminary dangers of conspiracies, and, generally speaking, the others also; indeed, I may say that they have all succeeded, and that it is open to every prudent man to act as they did. It will be enough to give two instances of plots effected in this way. Nelematus, unable to endure the tyranny of Aristotimus, despot of Epirus, assembling many of his friends and kinsmen in his house, exhorted them to free their country; and when some of them asked for time to consider and mature their plans, he bade his slaves close the doors, and told those assembled that unless they swore to go at once and do as he directed he would make them over to Aristotimus as prisoners. Alarmed by his threats, they bound themselves by a solemn oath, and going forth at once and without delay, successfully carried out his bidding. A certain Magus having fraudulently usurped the throne of Persia; Ortanes, a grandee of that realm, discovering the fraud, disclosed it to six others of the chief nobility, telling them that it behoved them to free the kingdom from the tyranny of this impostor. And when some among them asked for time, Darius, who was one of the six summoned by Ortanes, stood up and said, “Either we go at once to do this deed, or I go to the Magus to accuse you all.” Whereupon, all rising together, without time given to any to change his mind, they went forth and succeeded in effecting their end. Not unlike these instances was the plan taken by the Etolians to rid themselves of Nabis, the Spartan tyrant, to whom, under pretence of succouring him, they sent Alasamenes, their fellow-citizen, with two hundred foot soldiers and thirty horsemen. For they imparted their real design to Alasamenes only, charging the rest, under pain of exile, to obey him in whatever he commanded. Alasamenes repaired to Sparta, and never divulged his commission till the time came for executing it; and so succeeded in putting Nabis to death.
It was, therefore, by the precautions they observed, that the persons of whom I have just now spoken escaped all those perils that attend the contrivance of conspiracies; and any following their example may expect the like good fortune. And that all may learn to do as they did I shall notice the case of Piso, of which mention has before been made. By reason of his rank, his reputation, and the intimate terms on which he lived with Nero, who trusted him without reserve, and would often come to his garden to sup with him, Piso was able to gain the friendship of many persons of spirit and courage, and well fitted in every way to take part in his plot against the emperor, which, under these circumstances, might easily have been carried out. For when Nero came to his garden, Piso could readily have communicated his design to those friends of his, and with suitable words have
