According to Guy Halsall: http://books.google.com/books?id=S7ULzYGIj8oC&pg=PA520&lpg=PA520&dq=Aeti us+fourth+consulship&source=bl&ots=qLZxk_b7Vs&sig=-1VeY0LX2yJ64gZyKy1mBg kfgqQ&hl=en&ei=ZSbaSZHvFJmqMrv-qYEP&sa=X&oi=book_result&ct=result&resnum =1 identification of the fourth consulship of Aetius in 453 comes from the Consularia Constantinopolitana of Hydatius and the Fastii Vindobonenses Posteriori of 570 (of which I know nothing), but the modern scholarly consensus is that this was based on confusion. I have no knowledge that I could offer to refute the reported consensus opinion. I will only add that, if there was no fourth consulship for Aetius, it is all the more likely that Gildas could have referred to him as thrice consul anachronistically. Kevin A. Bowman