De re militari libri
Ex libro I
Taruntenus Paternus, Military Affairs, Book I. The condition of certain persons affords them exemption from more onerous employments, as, for instance, measurers of grain and their assistants, chronic invalids, physicians, slaves who carry the books of scholars, artisans, laborers who dig ditches, veterinaries, architects, pilots, ship carpenters, makers of ballistas, makers of glass, mechanics, manufacturers of arrows, workers in bronze, chariot-builders, tile-makers, gladiators, makers of pipes, trumpet makers, makers of musical instruments, makers of bows, workers in lead and iron, lapidaries, burners of lime, wood cutters and charcoal burners. Under the same category are also included butchers, hunters, those who deal in animals for sacrifice, the assistants of factory superintendents, those who attend the sick, weighers, not only those in warehouses and depositories, but also such as are charged with the distribution of supplies to the army, aids of military tribunes, couriers, the guards of arms, common criers, and trumpeters. All these persons are considered to be exempt from public office.