midnight exactly
`` No , no , '' she said , shaking her head sadly . `` Not now ! ... It would be too cruel ... let him hear me sing to-morrow evening ... and then we will go away . You must come and fetch me in my dressing-room at midnight exactly . He will then be waiting for me in the dining-room by the lake ... we shall be free and you shall take me away ... You must promise me that , Raoul , even if I refuse ; for I feel that , if I go back this time , I shall perhaps never return . '' And she gave a sigh to which it seemed to her that another sigh , behind her , replied . `` Did n't you hear ? ''