Many investigators of psychic science, members of the Society
for Psychic Research and others, have left sealed letters,
whose contents are known only to the writer. On the death of
the writer and before the letter is opened, an attempt is made
by a medium to reveal the contents.
Since only the writer knows what the letter contains, it is presumed
that on his death this knowledge can only be communicated
through his discarnate spirit.
A notable posthumous letter from the escapologist Harry
Houdini, was a code message apparently confirmed to his
widow by the medium Arthur A. Ford. However, the genuineness
of this story has been alternately confirmed, denied, and