midnight
`` What do you mean by the land and sea breezes in the West Indies , and other hot climates , papa ? '' `` It is the wind first blowing off from the shore , and then blowing from the sea towards the shore , during certain hours of the day , which it does regularly every twenty-four hours . This is also the effect of the heat of the sun . The sea breeze commences in the morning , and in the afternoon it dies away , when the land breeze commences , which lasts till midnight . '' `` There are latitudes close to the trade-winds , '' said Ready , `` where the wind is not certain , where ships have been becalmed for weeks ; the crews have exhausted the water on board , and they have suffered dreadfully . We call them the Horse latitudes - why , I do not know . But it is time for us to leave off , and for Master William to go into the house . ''