Baring-Gould’s sources: By the Greeks on this day Erastns, Olympas, Herodion, Sosipater, Tertius, and Qnartus. Erastus is mentioned in the Roman Martyrology on July 26, Herodion on April 8, Sosipater on June 25, Quartus on LYMPAS was a Christian at Rome (Rom. xvL XS)> perhaps of the household of Philologus. Pseudo-Hippolytus and Dorotheus say that he suffered martyrdom at Rome. The Roman Martyrology commemorates Olympius, a tribune and martyr baptized by Pope Stephen, who suffered martyrdom under Valerian, 257 or 258, and it is possible that this martyr may vol. xiii. 15 have been confounded with Olympas, mentioned by S. Paul. Dorotheus says, however, that he was one of the seventy disciples, and was decapitated with S. Peter. He is not mentioned in the passion of S. Peter by the pseudo-Linus, nor by the pseudo- Abdias, nor in the apocryphal Acts of SS. Peter and PauL Tertius, probably a Roman, was the amanuensis of Paul in writing the Epistle to the Romans (Rom. xvi. 22). Some have proposed without reason to identify him with Silas. Both Hippolytus and Dorotheus reckon him as one of the seventy, the former says that he became second bishop of Iconium.