midnight
`` Remember , midnight , '' called the general , as Hal was leaving the hut . Hal saluted again . `` Yes , general , '' he replied , and followed the young officer . Promptly at midnight Hal , greatly refreshed by a sound sleep and hearty meal , once more entered the general 's quarters and came to attention . `` The answer you are to carry back is simply : ` I shall act upon your plan , ' '' said General Givet . `` Good luck to you on your journey , and I have only one command : Make all possible haste . '' Hal saluted and set out on his return , journey to Liège .