Mystified

In response to Val's last post, I have some trouble linking Faraday to be the instigator of the activites of the poltergeist/spirit activities. If The House on the Strand is Time Travel, that implies to me that the events in that book are of past people shown being enacted before death. Spirit activities are then after death. That precludes Faraday from having anything to do with activating the poltergeist etc. Or have I missed the point?