6.22.1
XXII. Τότε δῆτα καὶ Ἱππόλυτος αυντάττωι μετὰ πλείστων ἄλλων ὑπομνημάτων καὶ τὸ Περ τοῦ πάσχα πεποίηται αύγγραμμα, ἐν ᾧ τῶι χρόνων ἀναγραφὴν ἐκθέμενος καί τινα κανόνα ἑκκαιδεκαετηρίδος περὶ τοῦ πάαχα προθείς, ἐπ’ τὸ πρῶτον ἔτος αὐτοκράτορος Ἀλεξάνδρου τοὺς χρόνους περιγράφει· τῶν δὲ λοιπῶν αὐτοῦ συγ. τὰ εἰς ἡμᾶς ἐλθόντα ἐατὶν τάδε· Εἰς τὴν Ἑξαήμερον, Εἰς τὰ μετὰ τὴν Ἑξαήμερον Πρὸς Μαρκίωνα, Εἰς τὸ Ἆισμα, Εἰς μέρη τοι Ἰεζεκιήλ, Περὶ τοῦ πάσχα, Πρὸς ἁπάσας τὰς αἱρέσεις, πλεῖατά τε ἄλλα καὶ παρὰ πολλοῖς εὕροις ἂν αῳζόμενα.
XXII. At that very time also Hippolytus, besides very many other memoirs, composed the treatise On Pascha, in which, after setting forth a register of the times and putting forward a certain canon of a sixteen-year cycle for the Pascha, using the first year of the Emperor Alexander as a terminus in measuring the times, he describes the years. Of his other treatises the following have reached us: On the Hexaëmeron, On what followed the Hexaëmeron, Against Marcion, On the Song, On Parts of Ezekiel, On the Pascha, Against All the Heresies; and very many others also might be found preserved by many people.