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 encouraged them to do what, in fact, they would not have had time to withdraw from, and was certain to succeed. And were we to examine all similar attempts, it would be seen that there are few which might not have been effected in the manner shown. But since most men are very ignorant of practical affairs, they commit the gravest blunders, especially in matters which lie, as this does, a little way out of the beaten track.

Wherefore, the contriver of a plot ought never, if he can help it, to communicate his design until the moment when it is to be executed; or if he must communicate it, then to some one man only, with whom he has long been intimate, and whom he knows to be moved by the same feelings as himself. To find one such person is far easier than to find several, and, at the same time, involves less risk; for though this one man play you false, you are not left altogether without resource, as you are when your accomplices are numerous. For I have heard it shrewdly said that to one man you may impart anything, since, unless you have been led to commit yourself by writing, your denial will go as far as his assertion. Shun writing, therefore, as you would a rock, for there is nothing so damning as a letter under your own hand.

Plautianus, desiring to procure the deaths of the Emperor Severus and his son Caracalla, intrusted the business to the tribune Saturninus, who, being more disposed to betray than obey Plautianus, but at the same time afraid that, if it came to laying a charge, Plautianus might be believed sooner than he, asked him for a written authority, that his commission might be credited. Blinded by ambition, Plautianus complied, and forthwith was accused by Saturninus and found guilty; whereas, but for that written warrant, together with other corroborating proofs, he must have escaped by his bold denial of the charge. Against the testimony of a single witness, you have thus some defence, unless convicted by your own handwriting, or by other circumstantial proof against which you must guard. A woman, named Epicharis, who had formerly been a mistress of Nero, was privy to Piso’s conspiracy, and thinking it might be useful to have the help of a certain captain of triremes whom Nero had among his body-guards, she acquainted him with the plot, but not with the names of the plotters. This fellow, turning traitor, and accusing Epicharis to Nero, so stoutly did she deny the charge, that Nero, confounded by her effrontery, let her go.

In imparting a plot to a single person there are, therefore, two risks: one, that he may come forward of his own accord to accuse you; the other, that if arrested on suspicion, or on some proof of his guilt, he may, on being convicted, in the hope to escape punishment, betray you. But in neither of these dangers are you left without a defence; since you may meet the one by ascribing the charge to the malice of your accuser, and the other by alleging that the witness his been forced by torture to say what is untrue. The wisest course, however, is to impart your design to none, but to act like those who have been mentioned above; or if you impart it, then to one only: for although even in this course there be a certain degree of danger, it is far less than when many are admitted to your confidence.

A case nearly resembling that just now noticed, is where an emergency, so urgent as to leave you no time to provide otherwise for your safety, constrains you to do to a prince what you see him minded to do to you. A necessity of this sort leads almost always to the end desired, as two instances may suffice to show. Among the closest friends and intimates of the Emperor Commodus, were two captains of the pretorian guards, Letus and Electus, while among the most favoured of his distresses was a certain Martia. But because these three often reproved him for his manner of living, as disgraceful to himself and to his station, he resolved to rid himself of them; and so wrote their names, along with those of certain others whom he meant should be put to death the next night, in a list which he placed under the pillow of his bed. But on his going to bathe, a boy, who was a favourite of his, while playing about his room and on his bed, found the list, and coming out of the chamber with it in his hand, was met by Martia, who took it from him, and on reading it and finding what it contained, sent for Letus and Electus. And all three recognizing the danger in which they stood, resolved to be beforehand with the tyrant, and losing no time, murdered him that very night.

The Emperor Caracalla, being with his armies in Mesopotamia, had with him Macrinus, who was more of a statesman than a soldier, as his prefect. But because princes who are not themselves good are always afraid lest others treat them as they deserve, Caracalla wrote to his friend Maternianus in Rome to learn from the astrologers whether any man had ambitious designs upon the empire, and to send him word. Maternianus, accordingly, wrote back that such designs were entertained by Macrinus. But this letter, ere it reached the emperor, fell into the hands of Macrinus, who, seeing when he read it that he must either put Caracalla to death before further letters arrived from Rome, or else die himself, committed the business to a centurion, named Martialis, whom he trusted, and whose brother had been slain by Caracalla a few days before, who succeeded in killing the emperor.

We see, therefore, that an urgency which leaves no room for delay has almost the same results as the method already noticed as followed by Nelematus of Epirus. We see, too, what I remarked almost at the outset of this Discourse, that the threats of princes expose them to greater danger than the wrongs they actually inflict, and lead to more active conspiracies: and, therefore, that a prince should be careful not to threaten; since men are either to be treated kindly or else got rid of, but never brought to such a pass that they have to choose between slaying and being slain.

As to the dangers attending the execution of plots, these result either from some change made in the plan, or from a failure in courage on the part of him who is to carry it out; or else from some mistake he falls into through want of foresight, or from his not giving the affair its finishing stroke, as when some are left alive whom it was meant to put to death. Now, nothing causes so much disturbance and hindrance in human affairs, as to be forced, at a moment’s notice and without time allowed for reflection, to vary your plan of action and adopt a different one from that fixed on at the first. And if such changes cause confusion anywhere, it is in matters appertaining to war, and in enterprises of the kind we are now speaking of; for in such affairs as these, there is nothing so essential as that men be prepared to do the exact thing intrusted to them. But when men have for many days together turned their whole thoughts to doing a thing in a certain way and in a certain order, and the way and order are suddenly altered, it is impossible but that they should be disconcerted and the whole scheme ruined. For which reason, it is far better to do everything in accordance with the preconcerted plan, though it be seen to be attended with some disadvantages, than, in order to escape these, to involve yourself in an infinity of dangers. And this will happen when you depart from your original design without time given to form a new one. For when time is given you may manage as you please.