He served as a fecial during the reign of the good emperor who brought progress to Rome.    From LearnThat.org. 

Adjective : fetial law.    From Dictionary.com. 

True, Spurius Postumius has just struck the herald fetial with his knee, then wage war!.    From Wordnik.com.  [The History of Rome, Vol. II] Reference

When they had entered the council chamber and reached the tribunal where Pontius was seated, the fetial addressed him thus: "Forasmuch as these men have, without being ordered thereto by the Roman people, the Quirites, given their promise and oath that a treaty shall be concluded and have thereby been guilty of high crime and misdemeanour, I do herewith make surrender to you of these men, to the end that the Roman people may be absolved from the guilt of a heinous and detestable act.".    From Wordnik.com.  [The History of Rome, Vol. II] Reference