ten o'clock
`` Help yourself , '' said Jack , looking up from a book he was reading . `` I 'll wait a little longer . '' Frank retired to his own cabin and was soon asleep . At ten o'clock , no word having been received , Jack put down his book and rose . `` Frank may be right , '' he told himself . `` At all events , I may as well turn in . My remaining up wo n't alter the facts , whatever they are . ''