eight o'clock
If you wish to challenge me for this doubt , I am at your disposal as soon as you have proven me in the wrong . But I choose the weapons . '' `` They must be chosen by lot , sir cousin , '' replied the lieutenant , his cheek pale and his jaws set . `` I will expect you to breakfast to-morrow morning at eight o'clock . '' The bridegroom nodded , and took the other 's cold dry hand for an instant . The men who had overheard the short conversation looked upon it as a meaningless incident , the memory of which would disappear from the lieutenant 's brain with the vanishing wine fumes . The ball was now over .