“I have a very good idea, but no proof rather,” returned the doctor. “The effects of the drug in altering the scale of time and space, and merging the senses have nothing primarily to do with the invasion. They come to anyone who is fool enough to take an experimental dose. It is the other features of your case that are unusual. You see, you are now in touch with certain violent emotions, desires, purposes, still active in this house, that were produced in the past by some powerful and evil personality that lived here. How long ago, or why they still persist so forcibly, I cannot positively say. But I should judge that they are merely forces acting automatically with the momentum of their terrific original impetus.”

“Not directed by a living being, a conscious will, you mean?”