The simulacrum is never what hides the truth - it is truth that hides the fact that there is none. The simulacrum is true. -Ecclesiastes (From Simulacra and Simulation, Jean Baudrillard)
A ghost only exists through its manifestations. Without impressing itself, it does not exist.
These works are an attempt at capturing a representation of a ghost. Through the depictions a portrait is derived and the original is revealed.