Mental Leaps: Analogy in Creative Thought. Cambridge MA: MIT Press, 1995, p. 14.
Wilbert Snow, Codline's Child (Middletown, CT: Wesleyan University Press, 1974), p. 39—
One day working ln the garden, Polly Dan stumbled over a big rock and sprained her leg. The post-mistress telephoned for Dr. Hitchcock, who took a good look at her leg, probed the muscles, and said: “Aunt Polly, I'll bet that's the dirtiest leg in all Knox County.” “How much will you bet?” asked Polly. “I’ll bet five dollars.” “All right, it’s a deal,” she said. Thereupon she took off her other shoe and stripped down her stocking. “I washed that one because I knew you were coming.” The doctor lost the money, but he had a story which he loved to tell for the rest of his life.