Spirit Phosphorescence
The first evidence of the presence and activity of the spirit forces
striving to produce the phenomena and materialization will probably be
the appearance of peculiar hazy phosphorescent lights playing in front
of the curtain forming the front of the cabinet. These lights will
consist of small globules or balls of phosphorescent light that will
dance about, like the familiar will-o'-the-wisp seen over swamps and in
damp, woody places. These lights will flit here and there, will
alternately appear and disappear. Sometimes they will appear as if a
multitude of fire-flies were clustered in front of the curtain. When
these fire balls appear the circle may know that it is well on the way
to perfect materializations.