Catholic Encyclopedia - SS. Cyrus and John, companions in life and in martyrdom. Beheaded in the Diocletian persecution. Feast day: 31 January. www.newadvent.org/cathen/04597b.htm
Catholic Online - Brief summary of the story of SS. Cyrus and John. saints.catholic.org/saints/cyrus.html
For All the Saints - Short hagiography of SS. Cyrus and John. users.erols.com/saintpat/ss/0131.htm#cyru
