"You see this cuckoo clock above the secretary; it is one of those which run fourteen or fifteen hours at most, for I have examined it.

Now it is more than probable, it is certain, that the widow wound it up every evening before going to bed.

How, then, is it that the clock has stopped at five?
Because she must have touched it.

As she was drawing the chain, the assassin knocked.

In proof, I show this chair standing under the clock, and on the seat a very plain foot-mark.