If Jupiter had approved the holding of an assembly, the magistrate was not for that reason necessarily done with auspices. Though the impetrativa may have favored, prohibitive oblativa were still possible, for circumstances might cause the god to change his mind so as to forbid what he had previously sanctioned; and the warning omen might come at any time before the act was completed. Sometimes the magistrate himself discovered, or for the accomplishment of his purpose pretended to discover, the evil omen. When for instance Pompey was holding an assembly for the election of praetors, and Cato, a political opponent, offered himself as a candidate, Pompey, seeing the assembly unanimous for this man, declared that he heard a clap of thunder, and thus by an adjournment succeeded in preventing the election.[663] Sometimes the magistrate was informed of the omen by (1) a private person, (2) an augur, or (3) another magistrate. In the first two cases the report was termed nuntiatio, in the third obnuntiatio.[664] Information received from a private citizen the president could credit or not as he saw fit, or he could declare it irrelevant;[665] but the law compelled him to accept the nuntiatio of an augur or the obnuntiatio of another magistrate. Prohibitive auspicia oblativa included evil omens of all kinds. When in 310 the dictator called the curiae for passing the lex de imperio, it chanced that the Curia Faucia was the first to vote (principium). Now this curia was ill omened because on two earlier occasions it had happened to be principium at a time of great national disaster. The dictator accordingly adjourned the meeting till the following day, when he again summoned it after renewing the auspicia impetrativa.[666] A case of epilepsy, by vitiating the business of the assembly, required an adjournment; and for that reason the malady was called the comitial sickness.[667] In the later republic the chief oblativa had come to be caelestia; and it could happen that the auspicia impetrativa of any magistrate might as oblativa vitiate the comitia of another. For this reason when a higher magistrate was about to hold an assembly, he forbade the taking of auspices by all inferior to him, for fear they might annul his proceedings.[668]