How the Whale Got His Throat

When the cabin port-holes are dark and green
  Because of the seas outside
  When the ship goes wop (with a wiggle between)
  And steward falls into the soup-tureen,
  And trunks begin to slide;
  When Nursey lies on the floor in a heap,
  And Mummy tells you to let her sleep,
  And you aren't waked or washed or dressed,
  Why, then you will know (if you haven't guessed)
  You're "Fifty North and Forty West!"