three o'clock
As for himself , he took an early nap in the evening , because at the very first break of dawn it would be necessary for him to be on the alert . He did not know how much he had depended upon the lake as a barrier of defence , but now that it had gone , he felt that the dangers which threatened them from the Rackbirds were doubled . It was still dark when the captain woke , and he struck a match to look at his watch . It was three o'clock . `` Is that you , captain ? '' said a voice from the next room . `` Is it time for you to begin watch again ? ''