five o'clock
They were landed in small boats , for there was no pier , and vessels of any considerable size could not cross the harbour bar . Miss Maitland counted up her forty pupils as they stood on the jetty -- a precaution that seemed more of a formality than a necessity , as everyone had taken good care not to be left behind . `` We have exactly three and a half hours here , '' she said . `` The steamer will be back at five o'clock . That gives us plenty of time to walk to the Abbey , and enjoy the ruins . I have ordered tea to be ready for us as soon as we return on board . We shall be very hungry by then , I 'm afraid , but there is nowhere to buy refreshments in this tiny place . ''