Archivus was one of the Argonauts who sailed with Jason to bring the Golden Fleece to Argos. He was a bard and he recorded the details of the Argonauts' heroics. Ten years later, he was part of the second expedition of the Argo when Castor and the Blood-Eye Cult stole the Golden Fleece. Sometime later, Archivus and the other Argonauts were guests at the wedding of Jason and Alcmene. They had to fight off a group of mercenaries that were hired to disrupt the ceremony by Patronius (HTLJ "The Wedding of Alcmene").