I agree with Goldbacher and Lenain de Tillemont, who think that there was only one presbyter Restitutus in the diocese of Hippo, and he was firstly beaten (Letter 105), and then, at another occasion, killed by the Donatists (Letter 133). Mandouze separates them, underlining that no previous violence is mentioned in Letter 133, and that Restitutus is a very frequent name.