One of the best documented circles of spirit-writing in the
late nineteenth century was Victor Hugo & family, in exile on
Jersey.
A channelled play, supposedly by Shakespeare was once on
the web at:
http://www.newpara.com/shakespe.htm
but it does not load at the moment.
The writings of this circle in tone and subject were very like the
writings of Hugo. On occasions, he would recognize echoes of
his own work and leave the circle. Oddly his son could not write
in the style of his father, except when the spirits dictated. The
"Shakespeare" play is very strange and surreal with talking
curtains, lamps and coffin-nails retelling a story of abduction,
somewhat like Le Roi s'amuse.
Until I can relocate the original page, there is a short account of this
weird episode in the last section of this page - scroll to the
bottom, unless fascinated by Verdi's Rigoletto.
http://www.btinternet.com/~j.b.w/rigo2.htm
Another odd musical footnote concerns the madness of Robert
Schumann. It is fashionable these days to put it down to syphilis
but some commentators have pointed out that Robert and Clara
had become enthusiastic table-turners shortly before his breakdown.
Schumann was already inclined to section off different aspects of
his personality. When young this was conscious and creative but
towards the end of his life, the theme "dictated by the angels"
turned out to be taken from his own Violin Concerto!