eight o'clock
`` At eight o'clock ! '' exclaimed Hardenberg . `` Do you hear , Conrad ? -- I must be there at eight o'clock . That is to say , you must awaken me at seven o'clock . '' `` But , your excellency , you will then have slept scarcely two hours , '' said Conrad , sadly . `` My old friend , '' said Hardenberg , `` shall we not have time enough for sleeping in our graves ?