It is certain from the text of Gaius that the earliest forms of will were those made in the "comitia calata" and those made in "procinctu", or on the eve of battle. The former were published before the "comitia", as representative of the patrician genies, and were originally a legislative act. These wills were the peculiar privilege of patricians. At a later time the form of plebeian will developed ("irs/amentum per aes ci libram"), and the law of testamentary succession was further modified by the influence of "tile practor", especially in the direction of recognition of "fideicommissa" similar in some respects to testamentary trusts. "Codicilli", or informal wills, also came into use and were sufficient for almost every purpose except for appointing an heir.