Note 074
Eutropius (x. 10 [6]) describes Vetranio with more
temper, and probably with more truth, than either of the two
Victors. Vetranio was born of obscure parents in the wildest
parts of Maesia; and so much had his education been
neglected, that, after his elevation, he studied the
alphabet.
Note to Chapter 18 of DECLINE & FALL by Gibbon