Chubb detector lock

Two stories.

Chubb Lock to the door.

Large sitting room on the right, well furnished with long windows almost to the floor.

And those preposterous English window fasteners, which a child could open.

He's really, really good at his job.

And he's on his way to this conference because on display at the Great Exhibition of London is a lock called the Chubb Lock, C-H-U-B-B.

You may have seen locks that still have that brand, that brand still exists.

And it's supposed to be an unpickable lock.