"And now," said the doctor, "for our conclusions. Mirza, the Polish Jewess, who became Lady Lashmore in 1615, practised sorcery in life and became, after death, a ghoul—one who sustained an unholy existence by unholy means—a vampire."
"But, sir! Surely that is but a horrible superstition of the Middle Ages!"
"Rob, I could take you to a castle not ten miles from Cracow in Poland where there are—certain relics, which would for ever settle your doubts respecting the existence of vampires. Let us proceed. The son of Mirza, Paul Dhoon, inherited the dreadful proclivities of his mother, but his shadowy existence was cut short in the traditional, and effective, manner. Him we may neglect.
"It is Mirza, the sorceress, who must engage our attention. She was decapitated by her husband. This punishment prevented her, in the unhallowed life which, for such as she, begins after ordinary decease, from practising the horrible rites of a vampire. Her headless body could not serve her as a vehicle for nocturnal wanderings, but the evil spirit of the woman might hope to gain control of some body more suitable.
"Nurturing an implacable hatred against all of the house of Dhoon, that spirit, disembodied, would frequently be drawn to the neighbourhood of Mirza's descendants, both by hatred and by affinity. Two horrible desires of the Spirit Mirza would be gratified if a Dhoon could be made her victim—the desire for blood and the desire for vengeance! The fate of Lord Lashmore would be sealed if that spirit could secure incarnation!"
Dr. Cairn paused, glancing at his son, who was writing at furious speed. Then—
"A magician more mighty and more evil than Mirza ever was or could be," he continued, "a master of the Black Art, expelled a woman's spirit from its throne and temporarily installed in its place the blood-lustful spirit of Mirza!"
"My God, sir!" cried Robert Cairn, and threw down his pencil. "I begin to understand!"
"Lady Lashmore," said Dr. Cairn, "since she was weak enough to consent to be present at a certain séance, has, from time to time, been possessed; she has been possessed by the spirit of a vampire! Obedient to the nameless cravings of that control, she has sought out Lord Lashmore, the last of the House of Dhoon. The horrible attack made, a mighty will which, throughout her temporary incarnation, has held her like a hound in leash, has dragged her from her prey, has forced her to remove, from the garments clothing her borrowed body, all traces of the deed, and has cast her out again to the pit of abomination where her headless trunk was thrown by the third Baron Lashmore!
"Lady Lashmore's brain retains certain memories. They have been received at the moment when possession has taken place and at the moment when the control has been cast out again. They thus are memories of some secret cavern near Dhoon Castle, where that headless but deathless body lies, and memories of the poignant moment when the vampire has been dragged back, her 'thirst unslaked,' by the ruling Will."