Sibylline Books
A short history of imperial Rome, entitled "De Caesaribus" written by Aurelius Victor in AD 361 states that Claudius consulted the Sibylline Books prior to his campaigns against the Goths. Hinting that Claudius "revived the tradition of the Decii", Victor illustrates the senatorial view, which saw Claudius' predecessor, Gallienus, as too relaxed when it came to religious policies.