six o'clock
As Nita retired she hesitated before her doorway . Her sharp black eyes caught the glint of the bulky revolver upon the library table . Those same black eyes dilated , her lips moved as though for another frightened exclamation , but all she said was : `` Thank you , madame ! I will not bother you again until six o'clock . Good-night , madame ! '' Then she closed her door . Nita was as discreet as she was faithful , in the service of her beloved madame .