nine o'clock
`` Thank you , monsieur , '' I said . `` You have as a guest , a certain Madame Armand Dalberg . '' `` A guest by Your Highness 's express permission , you will remember , '' he said . `` Very true , '' said I. `` Now , this Madame Dalberg expects a visitor to-night at nine o'clock . '' He gave me a quick glance . `` You know him ? '' I asked .