2 But since so obscure were these men, who flocked in from divers parts of the world to seize the imperial power, that not much concerning them can be either related by scholars or demanded of them, and since all those
who have written p67 in Greek or in Latin have passed over some of them without dwelling even on their names, and, finally, since certain details related about them by many have varied so widely, I have therefore gathered them all into a single book, and that a short one, especially as it is evident that much concerning them has already been told in the Lives of Valerian and Gallienus and need not be repeated here.
Historia Augusta
