twelve o'clock
`` What do you propose to do ? '' inquired Ben . `` We must get up in the morning before they do . '' `` We shall be obliged to get up at twelve o'clock , then , '' said Thomas . `` I had rather stay up all night than have them beat us , '' said Harry . `` Well , boys , '' said George , `` you must all come and sleep at our house to-morrow night . Some of us will be sure to wake up early , and , I think , we shall have no trouble in getting the start of the coast-guards . ''