A definite sum of money was owed to you, which is now sought to be recovered at law; and security for a legitimate portion of it has been given. In this case, if you have demanded one sesterce more than is owed to you, you have lost your cause; because trial before a judge is one thing, arbitration is another. Professor Long's explanation of the difference here laid down is little more than a translation of and comment on this passage. He says, “The following is the distinction between arbitrium and judicium according to Cicero (Pro Rosc. Com. 4). In a judicium the demand was of a certain or definite amount, pecuniae certae).; in an arbitrium the amount was not determined (incertae.) In a judicium the plaintiff obtained all that he claimed or nothing, as the words of the formula show, “si paret H. S. 1000 dari oportere.” (Compare Gaius, iv. 50.) The corresponding words in the formula arbitraria were “Quantum aequius melius, id dari”; and their equivalents were “ex fide bona; ut inter bonos bene agier.” (Top. 17)... If the matter was brought before a judex, properly so called, the judicium was constituted with a poena, that is per sponsionem; there was no poena when an arbiter was demanded, and the proceeding was by the formula arbitraria. The proceeding by the sponsio then was the strict one, “Angustissima formula sponsionis,” (Cic. pro Rosc. Com. 14); that of the arbitrium was ex fide bona, and the arbiter, though he was bound by the instructions of the formula, was allowed a greater latitude by its terms. The engagement between the parties who accepted an arbiter, by which they bound themselves to abide by his arbitrium, was compromissum. (Pro Rosc. Com. 40) But this term was also employed, as it appears, to express the engagement by which parties agreed to settle their differences by arbitration, without the intervention of the praetor. Smith, Dict. Ant. v. 530 v. Judex. Trial before a judge is about a definite sum of money; arbitration about one which is not determined. We come before a judge so as either to gain the whole suit or to lose it; we go before an arbiter on the understanding that we may not get all we asked, and on the other hand may not get nothing.

Of that the very words of the formula are a proof. What is the formula in a trial before a judge? Direct severe, and simple; “if it be plain that fifty thousand sesterces ought to be paid.” Unless he makes it plain that fifty thousand sesterces to a single farthing are due to him, he loses his cause. What is the formula in a cause brought before an arbiter? “That whatever is just and right shall be given.” But that man confesses that he is asking more than is owed to him, but that he will be satisfied and more than satisfied with what is given him by the arbiter. Therefore the one has confidence in his case, the other distrusts his.

And as this is the case, I ask you why you made an agreement to abide by arbitration in a matter involving this sum, this very fifty thousand sesterces, and the credit of your own account-books? why you admitted an arbitrator in such a case to decide what it was right and proper should be paid to you; or secured to you by bond, if it so seemed good to him? Who was the arbitrator in this matter? I wish he were at Rome. He is at Rome. I wish he were in court. He is. I wish he were sitting as assessor to Caius Piso. He is Caius Piso himself. Did you take the same man for both arbitrator, and judge? Did you permit to the same man unlimited liberty of varying his decision, and also limit him to the strictest formula of the bond? Who ever went before an arbitrator and got all that he demanded? No one; for he only got all that it was just should be given him. You have come before a judge for the very same sum for which you had recourse to an arbiter.

Other men, when they see that their cause is failing before a judge, fly to an arbitrator. This man has dared to come from an arbiter to a judge, who when he admitted an arbitrator about this money, and about the credit due to his account-books, gave a plain indication that no money was owing to him. Already two-thirds of the cause are over. He admits that he has not set down the sum as due, and he does not venture to say that he has entered it as paid, since he does not produce his books. The only alternative remaining, is for him to assert that he had received a promise of it; for otherwise I do not see how he can possibly demand a definite sum of money. Did you receive a promise of it? When? On what day? At what time? In whose presence?

Who says that I made such a promise? No one. If I were to make an end of speaking here, I appear to have said enough to acquit myself as far as my good faith and diligence are at stake—to have said enough for the cause and dispute, enough for the formula and bond; I seem to have said enough to satisfy the judge why judgment ought to pass for Roscius. A definite sum of money has been demanded; security is given for a third part of it; this money must either have been given, or set down as paid, or promised. Fannius admits it was not given; the books of Fannius prove that it has not been set down as paid; the silence of witnesses proves that it was never promised.

What do we want more? Because the defendant is a man to whom money has always seemed of no value, but character of the very highest, and the judge is a man whom we are no less anxious to have think well of us than to decide favourably for us, and the bar present is such, that on account of its extraordinary brilliancy we ought to feel almost as much respect for it as for another judge, we will speak as if every regular trial, every honorary arbitration, every domestic duty were included and comprehended in the present formula. That former oration was necessary, this shall be a voluntary one; the other was addressed to the judge, this is addressed to Caius Piso; that was on behalf of a defendant, this is on behalf of Roscius; the one was prepared to gain a victory, this one to preserve a good character.