"Who told you that Nell Darrel was in this house?"
"It matters not. Lead the way at once, or it will be the worse for you."
"You dare not harm me."
"I'll show you, if you attempt to play me false. A dozen policemen have their eyes on this building at this moment."
"Come on."
The woman turned and walked forward. She passed into a hall, and halting at a side door, unlocked it and pushed it open.
"In there."
"Go on. You shall keep me company."
Mrs. Scarlet advanced, closely followed by the detective.
The moment he crossed the threshold the door closed behind him, and the lamp was extinguished, leaving everything in total darkness. Then the detective felt the floor give way, and he was precipitated to his doom, the last sound reaching his ears being a mocking laugh from Aunt Scarlet.