Rev. Alban Butler (171173). Volume VI: June. The Lives of the Saints. 1866.
SS. Ferreolus, or Fargeau, a Priest, and Ferrutius, a Deacon, Martyrs
THEY were ordained by St. Irenæus, and sent by him to preach the gospel at Besançon, where after suffering many torments they were beheaded for the faith in the persecution of Severus in 211 or 212. St. Gregory of Tours says,1 that their relics were glorified by miracles in his time, and that his brother-in-law was cured by them of a dangerous distemper. They are at this day esteemed the great treasure of the cathedral of Besançon. See their ancient acts cited by St. Gregory of Tours, with the notes of Henschenius, Junij, t. 3, p. 6.