I have been trying to reseach is occurance, and can find no details.
Only a minor referrence on a website called Rotten.com. Can you refere
me to more specific data?

jcrouse3880-ga,

You may have to change what you're typing when you search via the
Internet's numerous search engines. I like to point out that "people
aren't stupid, computers are." Being one typed character off from what
is used in the search engine will result in no hits. I am constantly
mistrusting my own ability to spell and type.

Using my all time favorite web search engine, Google:

   ://www.google.com/

I put in the following phrase exactly (including quote marks and
apostrophe):

   "st. john's dance"

One of the first documents you will find is an excellent overview of
St. John's Dance where we are almost immediately told that it is also
known as "St. Vitus's Dance."

   Egon Schmitz-Cliever, M.D. - The Pied Piper and St. Vitus's Dance
   http://freenet.msp.mn.us/org/mythos/mythos.www/VITUS.HTML

Another excellent resource is an old public health book published in
1832:

   The Black Death and The Dancing Mania by J. F. C. Hecker
   http://biotech.law.lsu.edu/Books/hecker/Death_c.htm

Two chapters in this book discuss St. John's Dance specifically:

   http://biotech.law.lsu.edu/Books/hecker/Death12.htm

and St. Vitus's Dance:

   http://biotech.law.lsu.edu/Books/hecker/Death13.htm

I would also recommend using the following search phrases (again,
include all punctuation):

   "dancing mania" and vitus
   "dancing mania" and john's

You should have no problem turning up a number of sites with the
information you need. One of the sites that I uncovered using the
above searches was from the History of Medicine web site where they
have an excellent collection of slides as part of a presentation done
specifically on "Dancing Manias":

   From the Dancing Manias to Sydenham's Chorea
   http://www.medinfo.ufl.edu/other/histmed/okun2/index.html

Don't hesitate to ask for a clarification if this doesn't suit your
needs.

fugitive-ga