Hello delta59,
Just to add that the Chester asylum, known locally as "The Deva" was situated on the outskirts of Chester at Upton off the Liverpool Road.
This was a large site as the hospital had extensive grounds and these included a farm, amongst other things.
The buildings are still there but now form part of the Countess of Chester Hospital. You can see the old Victorian buildings on one side of the development. I think they were in use for mental health patients up to the 1980s. In recent years there have been attempts to build on the lands surrounding these.
Jo