four o'clock
Then for an hour she lay quiet , while the knights , divesting themselves of their mantles and armour , worked one of the guns on the poop , aiming at a floating barrel moored for the purpose a mile out at sea . At eleven o'clock they returned to the port . Bread and water were served out to the slaves , and they were then permitted to lie down and sleep , the galley being moored under the shadow of the wall . At four o'clock another party of knights came down , and the work was similar to that which had been performed in the morning . At seven o'clock the slaves were taken back to their barracks . `` Well , what do you think of your work ? '' one of the slaves asked Gervaise , as they ate their evening meal .