twelve o'clock
`` What are you in a brown study for ? '' he asked . `` Oh , Boris , '' she exclaimed , flashing round on him ; `` it is more a white dream than a brown study . Fancy this room all lit with Chinese lanterns and the moon outside , and us sitting up until twelve o'clock , and music , Boris , and everybody dancing . The story books will have come true -- oh , it will be too lovely . '' `` I 'm thinking of the supper , '' said Boris . `` I expect I 'll get awful peckish sitting up so late .