In this variation of the Nostradamus Trick, a telescope-tube is mounted,
instead of the false mirror, on a stand on a table. It has a plane
mirror set in it at an angle of forty-five degrees over the stand, which
is hollow and communicating with a drawer of the table, opening into the
next room, with a second plane mirror, to reflect any person therein, up
to the tube reflector.
The inner room should be dark, so that, when the light is cut off, the
figure will vanish.