From the events this past autumn, I am compelled to relate my perilous trial. The supposition that darkness is merely the absence of light is both popular and false, as those who practise the occult can affirm. In the dark cellar of number thirteen Jolimont Street, a house the Professor had assumed benign, I unwittingly brought forth an ancient evil that first threatened our reputations, then our souls. This is the fourth book in the Paranormology Series.