This
 first argument, drawn both from the rules of civil rights, and from the customs
 prevailing with respect to such security, is a most important and powerful one, which I
 would press at greater length, if I had not other more undeniable and manifest proofs in
 the cause. 
 And that you may not say I have promised this on insufficient grounds, I will call
 you—you, I say, Fannius—from your seat as a witness against
 yourself.—What is your charge? That Roscius settled with Flavius on behalf of
 the partnership.—When? Four years ago.—What is my defence? That
 Roscius settled with Flavius for his share in the property. You yourself, three years
 ago, made a new engagement with Roscius.—What? Recite that stipulation
 plainly.—Attend, I beg you, O Piso —I am compelling Fannius against his will, and though he is
 shuffling off in every direction, to give evidence against himself. For what are the
 words of this new agreement? “Whatever I receive from Flavius, I undertake to
 pay one half of to Roscius.” These are your words, O Fannius.