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!"

Rudyard Kipling

http://www.poemhunter.com/poem/how-the-whale-got-his-throat/