“A nine-year-old boy called Leif was summer-holidaying with his family on the fjord, and the whole family was picnicking and swimming off some rocks on one of those little islands. Young Leif dived into the water and his father, who was watching him, noticed that he stayed under for an unusually long time. When he came to the surface at last, he wasn't Leif any more."
      "What was he, Grandmamma?"
      "He was a porpoise."
      "He wasn't! He couldn't have been!"
      "He was a lovely young porpoise," she said. "And as friendly as could be."
      "Grandmamma," I said.
      "Yes, my darling?"
      "Did he really and truly turn into a porpoise?"
      "Absolutely," she said. "I knew his mother well. She told me all about it. She told me how Leif the“Porpoise stayed with them all that afternoon giving his brothers and sisters rides on his back. They had a wonderful time. Then he waved a flipper at them and swam away, never to be seen again.”

Chapter 1: My Grandmother