to　have　succumbed　to　the　influence　of　many　cups　and　said；　〃Have　you　any　capable　medical　people　in　your　army？〃

〃What　are　they　for；　Master？〃　said　Cao　Cao。

〃There　is　a　lot　of　illness　among　the　marines；　and　you　ought　to　find　some　remedy。〃

The　fact　was　that　at　this　time　Cao　Cao's　men　were　suffering　from　the　climate。　Many　were　vomiting　and　not　a　few　had　died。　It　was　a　source　of　great　anxiety　to　him；　and　when　the　newer　suddenly　mentioned　it；　of　course　he　had　to　ask　advice。

Pang　Tong　said；　〃Your　marine　force　is　excellent；　but　there　is　just　one　defect。　It　is　not　quite　perfect。〃

Cao　Cao　pressed　him　to　say　where　the　imperfection　lay。

〃I　have　a　plan　to　overe　the　ailment　of　the　soldiers　so　that　no　one　shall　be　sick　and　all　fit　for　service。〃

〃What　is　this　excellent　scheme？〃　said　Cao　Cao。

〃The　river　is　wide；　and　the　tides　ebb　and　flow。　The　winds　and　waves　are　never　at　rest。　Your　troops　from　the　north　are　unused　to　ships；　and