Mr. Popper wrote a letter to Dr. Smith, about 2 days later, there was a letter from Mr. Smith saying that he might need a mate so he's sending a female penguin.  And Mr. Popper named her Greta, and Captain cook became well with her, she also laid 10 eggs. When the egg hatched and soon grew as a baby penguin, Mr. Popper trained all the penguin and did a show, the show was so good and funny, it became well known. Few months later, Admiral Drake came in for a visit, he said he wanted Mr. Popper and the penguins to join him in South Pole and Mr. Popper went there, it was a dream come true!