forthing sent sipho down the line with a swallow of rum for each man - the last dribbled end of their supply , with nowhere to look for more ; but he did not mix it with water , and the taste of the hard liquor heartened them , more a memory of satisfaction than a reality with the sun still beating upon them , but with a great straining effort they drew again upon the ropes , and caesar , for all his complaining , threw his powerful shoulders fully into the effort .