All the mss., and editions of Eusebius read τρίτον instead of ὑιόν here. But it is very difficult to make any sense out of the word τρίτον in this connection. We therefore prefer to follow Spitta (see ibid. pp. 87 sqq.) in reading ὑιόν instead of τρίτον, an emendation which he has ventured to make upon the authority of Rufinus, who translates “genuit Joseph filium suum,” showing no trace of a τρίτον. The word τρίτον is wanting also in three late Catenæ which contain the fragments of Africanus’ Epistle (compare Spitta, ibid. p. 117, note 12).