`When we were little,' the Mock Turtle went on at last, more calmly, though still sobbing a little now and then, `we went to school in the sea. The master was an old Turtle--we used to call him Tortoise--'
`Why did you call him Tortoise, if he wasn't one?' Alice asked.

`We called him Tortoise because he taught us,' said the Mock Turtle angrily: `really you are very dull!'


With apologies to L. Carroll