I recently came across the old pinfold on Hillfoot Rd, Totley, which has been well kept as a public space with an informative information board. How many pinfolds were in the city? What do people know of their operation and history?
http://www.geograph.org.uk/photo/1688081
I used to work with Chris Watson (member of Cabaret Voltaire) many years ago.
He's now one of the top sound men in the world, I've noticed his name for instance on nearly every Bill Oddie TV nature programme.
He has a web site:
http://www.chriswatson.net
Here is a picture of Chris when i worked with him.