midnight
` Do you know , ' he asked , speaking with sustained energy and clearness , ` the door by which M. de Rosny entered to talk with me ? Can you find it in the dark ? ' ` Yes , sire , ' I answered , my heart beating high . ` Then be in waiting there two hours before midnight , ' he replied . ` Be well armed , but alone . I shall know how to make the girl speak . I can trust you , I suppose ? '