Lat. Im the civil law. A little book. Libellus supplez, a petition, especially to the emperor, all petitions to whom must be in writing. Libellum rescribere, to mark on such petition the answer to if Lé- bellum agere, to assist or counsel the emperor in regard to such petitions. Libellus aocusatorius, an information and accusation of a crime. Libellus divortii, a writing of divorcement. Libellus rerum, an inventory. Calvin. Libellus or oratio consultoria, a message by which emperors laid matters before the senate. Id.