Then Juliet spoke again.

"I cannot help wondering what you expect to find," she observed.
"I thought there might be a secret entrance," said Jennings, looking at her keenly, "but there seems to be none." Miss Saxon appeared genuinely astonished and looked round.

"I never heard of such a thing," she said, puzzled.

"And what would a quiet old lady like my aunt need with a secret entrance ?" "Well, you see, the assassin could not have sounded that bell and have escaped by the front door.

Had he done so, he would have met Susan Grant answering the call.