Edward, Mavis, Skarloey, & Thomas Are Traveling To The South Pole. However, When They Arrived At The South Pole, They Saw A Big Walrus. Walrus is a really big mammal. Edward & Mavis Always Thinking About That The Walrus Is A Big Mammal. Everyone's Feeling Impressed. The Next Day, Edward, Mavis, Skarloey, & Thomas Arrives at Brendam Docks, Sir Topham Hatt Arrives, He Explains That Walrus Is A Really Big Mammal. That Made Edward & Mavis Feeling Impressed.