"I'm not bluffing, Miss Drew. I have proof that between the hours of 9.00 p.m. and 11.45 p.m. Mr. North was not at his flat."
Helen moistened her lips. "That's absurd. Of course he was. He can have had no possible reason for having said so if it weren't true."
Hannasyde said quietly: "You don't expect me to believe that, do you,. Mrs. North?"
Sally stretched out her hand for the cigarette-box. "Obviously not. According to your idea, my brother-inlaw may have been at Greystones."
"Precisely," nodded Hannasyde.
A flash of anger made Helen's eyes sparkle. "Be quiet, Sally! How dare you suggest such a thing?"
"Keep cool. I haven't suggested anything that wasn't already in the Superintendent's mind. Let's look at things sanely, shall we?"
"I wish you'd go away! I told you I didn't need you!"
"I know you wish I'd go away," replied Sally imperturbably. "The Superintendent wishes it too. It stands out a mile that his game is to frighten you into talking. If you've a grain of sense you'll keep your mouth shut, and let John do his own talking."
"Very perspicacious, Miss Drew," struck in Hannasyde. "But your words imply that there would be danger in your sister's being frank with me."