Well, that question was not to be answered offhand. But the fact that it was so had made Antony interested in her; and it was for this reason that he had followed up so alertly Bill’s casual mention of her in connection with the dressing-up business. He felt that he wanted to know a little more about Miss Norris and the part she had played in the Red House circle. By sheer luck, as it seemed to him, he had stumbled on the answer to his question.

Miss Norris was hurried away because she knew about the secret passage.

The passage, then, had something to do with the mystery of Robert’s death. Miss Norris had used it in order to bring off her dramatic appearance as the ghost. Possibly she had discovered it for herself; possibly Mark had revealed it to her secretly one day, never guessing that she would make so unkind a use of it later on; possibly Cayley, having been let into the joke of the dressing-up, had shown her how she could make her appearance on the bowling-green even more mysterious and supernatural. One way or another, she knew about the secret passage. So she must be hurried away.