Her troubled, invisible presence permeates the script.

Not unlike the tracery of a palimpsest each paired drawing appears as though connected by an invisible presence.

Descriptions of the apparition of ghosts vary widely from an invisible presence to translucent or barely visible wispy shapes, to realistic, lifelike visions.

There are touches, pushes and pulls by invisible presences, light anomalies, apparitional footsteps, disembodied voices and other unexplained noises, shadow figures.