For All the Saints - Hagiography of SS. Simplicius, Faustinus, and Beatrice. - http://www.saintpatrickdc.org/ss/0729.htm#simp
Catholic Encyclopedia - SS. Simplicius, Faustinus, and Beatrice, two brothers and their sister, all martyrs in the Diocletian persecution. - http://www.newadvent.org/cathen/14003a.htm