Possession and Identity

The theme of spirit possession is central, as characters like Lady Lashmore are controlled by the vampire spirit Mirza, blurring the lines between self and other, and questioning the stability of personal identity.

Sir Michael's altered behavior and the strange influence over him suggest a loss of self or external control.

The shadowy things and the sense of being followed suggest an assault on Robert's mind and identity.

Dr. Cairn explains how Mirza's spirit seeks incarnation in a human body, posing a danger of possession.

Lady Lashmore is possessed by the spirit of the vampire Mirza, losing control of her own identity and actions.