Pope St. Anicetus, Decretal to the Bishops of Gaul [ancient France]: “Clergymen shall not wear long hair…have them to live according to the Doctrine of St. Paul; and as they are to differ from Seculars in virtuous life and conversation, so are they to be distinguished from them in habit, and cut off their hair.” (Quoted by Fr. Pedro de Ribadeneyra, “The Lives of the Saint, With Other Feasts of the Year, According to the Roman Calendar” translated into English by William Petre, 1730)