Note 1785 — BOOK XV.

Ergastulum is put sometimes for the slave himself, sometimes for the under-ground dungeon where, as a punishment, he was set to work. Cf. Juv., vi., 151, "Ergastula tota." viii., 180, "Nempe in Lucanos aut Tusca ergastula mittas." xiv., 24, "Quem mire afficiunt inscripta ergastula." Nonius says that the masculine form, ergastulus, is used for the "keeper of the bridewell," custos pœnalis loci.