Addit etiam illud, quod vinctum fasciola Aurelianum aquila innoxie de cunis levaverit et in aram posuerit, quae iuxta sacellum forte sine ignibus erat. idem auctor est vitulum matri eius natum mirae magnitudinis, candidum sed purpurantibus maculis, ita ut haberet in latere uno “ave” et in alio coronam.
(Historia Augusta, Vita Aureliani 4.6-7)
This, too, is related, that Aurelian, while wrapped in his swaddling-clothes, was lifted out of his cradel by an eagle, but without suffering harm, and was laid on an altar in a neighbouring shrine which happened to have no fire upon it. The same writer asserts that on his mother’s land a calf was born of marvellous size, white but with purple spots, which formed on one side the word “hail,” on the other side a crown. (tr. David Magie)
Crambe Repetita 