CHAPTER XII.
Something wrong with the tank--Jack's wisdom and Peterkin's impertinence--Wonderful behaviour of a crab--Good wishes for those who dwell far from the sea--Jack commences to build a little boat.
Rest is sweet as well for the body as for the mind.

During my long experience, amid the vicissitudes of a chequered life, I have found that periods of profound rest at certain intervals, in addition to the ordinary hours of repose, are necessary to the wellbeing of man.

And the nature as well as the period of this rest varies, according to the different temperaments of individuals, and the peculiar circumstances in which they may chance to be placed.

To those who work with their minds, bodily labour is rest.

To those who labour with the body, deep sleep is rest.