I’m still doing research on the Stone Tape idea, as a paranormally-curious geologist does. I was interested in obtaining a book by T.C. Lethbridge because his name comes up repeatedly as a promoter of the concept. It’s been a tricky thing to trace the origin without having easy access to the literature in print. I’ll keep looking. Meanwhile, I was able to secure a copy of Ghost and Ghoul (1961) via intra-library loan from my local county library (to whom I donate financially every month because they are awesome). I’m glad I didn’t purchase it. It’s was absolutely worse than I anticipated. And, it had essentially no mention of the physical recording of ghosts. In fact, Lethbridge promotes the idea that ghosts and ghouls (not visible but “felt” usually as coldness and oppression) are mental manifestations. Back to that idea by and by. First, some additional information about Lethbridge gleaned from this volume. I’m sure there is far more about Lethbridge since he was apparently notable in his time and warranted references and biographies. But after this introduction, you may not wish to bother.