εἰς τὰ κατ᾽ ῎Αιγυπτον žργα. The works meant are the great stone quarries of Egypt (commonly called the mines of Egypt), which furnished a considerable part of the finest marble used for building purposes in Rome and elsewhere. The quarries were chiefly in the hands of the Roman government, and the work of quarrying was done largely by captives taken in war, as in the present case.