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"Well, there is at least a curious coincidence of dates. A

ventilator is made, a cord is hung, and a lady who sleeps in the

bed dies. Does not that strike you?"

"I cannot as yet see any connection."

"Did you observe anything very peculiar about that bed?"

"No."

"It was clamped to the floor. Did you ever see a bed fastened

like that before?"

"I cannot say that I have."

"The lady could not move her bed. It must always be in the same

relative position to the ventilator and to the rope-or so we may

call it, since it was clearly never meant for a bell-pull."

"Holmes," I cried, "I seem to see dimly what you are hinting at.

We are only just in time to prevent some subtle and horrible

crime."