eleven o'clock
`` What ! Are you going to begin now ? '' `` Yes . '' And Percy sits up till eleven o'clock , and succeeds in that time in cataloguing after a fashion , and not badly for a first attempt , two of the smallest shelves in the library , for which he receives then and there five shillings , much to his own comfort and to his father 's amusement . Mrs Rimbolt comes into the library just as the business is concluded . `` Why , Percy , not in bed -- and so tired too ! '' `` Oh , I 've been doing some work for father , '' says the boy , chinking the two half-crowns in his pocket .