a quarter past six
His almanac gave the rising and the setting of the sun , and it was the exact hour of sunset that he wished : `` 26 March , 6h . 20m . '' At this moment it would not be dark enough at Madame Dammauville 's for lamps to be lighted , and yet it would be dark enough to prevent her from seeing him clearly in the uncertain light of evening . `` Will a quarter past six suit you ? I will call for you at six o'clock . '' `` Very well . Only I shall ask you to be very exact ; I have a dinner at seven o'clock in the Rue Royale . ''