four in the
morning
Each student ascertained his duty for the night , and his off-time and study-hours for the next day , which were included in the first day 's bill . `` I go on at twelve o'clock , '' said Paul Kendall , in the after cabin , when he had examined the bill . `` And I go on deck at eight o'clock , '' added Joseph Haven , the first lieutenant . `` I shall have a chance to sleep from ten till four in the morning , and an hour and a half , from six till half past seven . '' `` I shall have my watch below from two till breakfast time . I do n't think we need wear ourselves out under this arrangement . '' `` No ; I thought we should be obliged to take four hours of duty at a time on deck . ''