six o'clock
`` Right , '' replied the lieutenant . `` I guess we had better turn in . '' The four lay down upon the dirty mattresses , and with their minds more at ease were soon asleep . It was after six o'clock when Uncle Billy once more entered the cell with their `` dinner , '' which consisted of another vessel of water and a second loaf of bread . Hal made a grimace . `` Is that what you call dinner , Uncle Billy ? '' he demanded .