Optatus defends the cause of Macarius at great length in his third book against Parmenianus. Of Ursacius he says in the same place: "You are offended at the times of a certain Leontius, of Ursacius, Macarius, and others." And Augustine, in his third book against Cresconius, c. xx., introduces an objection of the Donatists against himself: "But so soon as Silvanus, bishop of Cirta, had refused to communicate with Ursacius and Zenophilus the persecutors, he was driven into exile," Usuardus, deceived by a false story made up by the Donatists, enters in his Martyrology that a pseudo-martyr Donatus suffered on the 1st of March, under Ursacius and Marcellinus, to this effect: "On the same day of the holy martyr Donatus, who suffered under Ursacius the judge and the tribune Marcellinus."