eight o'clock
Paul quickly raised his finger to his lips . `` Let 's go outside , '' he said . `` Some one may hear us here ... '' At eight o'clock Mary had gone to Helen 's . `` If I 'm not back at ten , I sha 'n' t be home tonight , '' she had told Hutchins as she left the house . At half past eight Archey called , full of the topic which had been started that afternoon . Hutchins told him what Mary had said .