ten o’clock
`` I will send the devil to worry it . Watch the cat , and as its death is so shall yours be -- unless -- '' `` Unless ? '' said the Jew , regarding him mockingly . `` Unless to-night before ten o'clock you mark on your door-post two crosses in chalk , '' said the other . `` Do that and live . Watch your cat . '' He pointed his lean , brown finger at the animal , and , still feeling at his throat , stepped softly to the door and passed out .