About eight o'clock
`` At this hour ! '' `` What is the time ? '' asks the man of science . `` About eight o'clock , '' the janitor replies . `` It is late , '' comments M. Marmus . `` Take me home , driver . '' The driver goes through the quays , the Rue du Bac , falls into a tangle of wagons , returns by the Rue de Grenelle , the Croix-Rouge , the Rue Cassette , then he makes a mistake .