Rev. Alban Butler (171173). Volume V: May. The Lives of the Saints. 1866.
SS. Castus and Æmilius, Martyrs
THEY had first fallen in the persecution; but being touched with remorse, rose again with greater fervour, and triumphed over the flames. St. Austin, in a sermon which he preached on their festival, says, they fell like St. Peter by presuming on their own strength. They suffered in Africa, probably under Decius, in 250. See St. Cyprian de lapsis, St. Austin. Serm. 285, and the old African Martyrology of the fifth century.