For various reasons, I ran across something I should have mentioned before.
My friend and colleague Chris Williams published a fascinating article on the early days of police surveillance in the journal Surveillance & Society earlier this year.
Not only is there good analysis to be had, but the primary source -- a surveillance film of street betters in Chesterfield in 1935 -- is remarkable.
There are times when I remember why I love my chosen profession.
Enjoy the rare glimpse into the past.
(And all praise to S&S for being freely available to the public.)