six o'clock
They slept on the hard bricks , pillowing their heads on each other 's legs , or lay awake and listened to their fellows ' moans . Two sentries with loaded muskets kept guard by the door , and looked in whenever a chain clanked or some unfortunate began to rave in his sleep . Before morning a third of the gang was sickening for rheumatic fever or typhus . At six o'clock the sergeant entered and examined them . Then he retired , and came back in another hour with a covered wagon , into which the sick were hoisted and packed like herrings . All who had power to move their legs were afterwards turned out and treated to a pound and a half of the `` King 's bread '' and a drink of water before starting . Tristram was one of these .