Until Gilbert–watching the classic movie channel–had seen the old Humphrey Bogart/Katharine Hepburn classic, African Queen, and had seen Bogey covered with leeches, he had never thought much about the problem.  Now he was almost dehydrated, staying out of the water, fearing that leeches would attack and suck him dry of blood while in the water in spite of the tough scales that armored most of his body. . . . .  David, Sf.G.