seven o'clock
`` And I shall hold you to that bargain , O Marc ` antonio , '' said she . `` But what will you two be doing with yourselves meanwhile ? '' `` With permission , Princess , we return to the theatre . We shall watch the play , and keep our eyes on him ; and at half-past seven o'clock the girl Bianca dances in the ballet . Mbe ! I have not witnessed a ballet since my days of travel . '' `` And I will run home , then , and fetch my mask .