'be , ' said the letter , 'on thursday next , at from six to seven o'clock in the evening , on the road to chaillot , and look carefully into the carriages that pass ; but if you have any consideration for your own life or that of those who love you , do not speak a single word , do not make a movement which may lead anyone to believe you have recognized his who exposes himself to everything for the sake of seeing you but for an instant . '