`Ten hours the first day,' said the Mock Turtle: `nine the
next, and so on.'

  `What a curious plan!' exclaimed Alice.

  `That's the reason they're called lessons,' the Gryphon
remarked:  `because they lessen from day to day.'

  This was quite a new idea to Alice, and she thought it over a
little before she made her next remark.  `Then the eleventh day
must have been a holiday?'