Was Essex Mountain Sanitorium really haunted?
http://www.mountainsanatorium.net/ Just check it out.
This really depends on where you start in London and where you want to end up in Essex - Essex starts on the edge of East London, so if you're starting in East Ham (in London) and travelling to Ilford (in Essex) its a couple of minutes. On the other hand, if you start in Kingston and go to Clacton, it will take over 2 hours.
The Salem Panic is unique because of who was accused. Not all of them fit the definition of the stereotypical witch like in most other witch trials. To this day we can find no single trait connecting all the accused except that they lived in Essex County, which doesn't really count because if the panic is in Essex County, the people involved are in Essex County.