"I heard you humming." "Yes," he said. "I hum a great deal. Can you hum?" "Yes," I replied. "I can hum. I hum a good deal, too, and even sing, especially when I get out of the spring in the morning. Then I really sing aloud." "Let's hear you sing aloud." So I said, feeling very relaxed with the sun shining on my head, "All right, I'll sing you my cold water song."