“The libellus conventionis was very like the intentio of the formulary system, and the modern statement of claim, since it set forth in a succinct manner the nature of the plaintiff’s right and the circumstances attending its alleged violation.” R.W. Leage, Roman Private Law 417 (C.H. Ziegler ed., 2d ed. 1930).
libellus conventionis
libellus conventionis (l[schwa]-bel-[schwa]s k[schwa]n-ven-shee-oh-nis). [Latin] Roman law. The statement of a plaintiff’s claim in a petition sent to the magistrate, who directs its delivery to the defendant.