The most influential source for Avitus is the Historia Augusta, a very comprehensive collection of imperial biographies written by six different authors around the year 300. The Historia Augusta is a very interesting book. Unlike most Roman histories, it’s dense with primary sources: extracts from letters, speeches, pronouncements. It’s also packed with quotes and references from other histories, some of which are unattested in any other source. The only problem is that it seems to have been written as a piece of vicious revenge against all future historians. A few of its emperors are described issuing decrees or holding councils on dates when we know they were otherwise occupied being dead. Other people described in the Historia Augusta never existed at all. Neither did the other books describing them, or the historians who supposedly wrote those books. It points to whole libraries of unreal texts. Like a book that fell into our world from a parallel universe. Also, the six authors all write in exactly the same style, and their Latin is the Latin of at least a century after they were supposed to have been writing. (Imagine a Victorian novel in which characters all greet each other with ‘wassup.’) It’s all a big prank. But annoyingly, some of the material in the Historia Augusta is accurate. It’s just that when there are no other corroborations, we can’t know which parts. Whoever actually wrote it is a personal hero of mine.
The dust of God - by Sam Kriss - Numb at the Lodge