Pinkerton, Allan: The Spiritualists and the Detectives. v1. 20 Apr 2014
 

Allan Pinkerton (25 August 1819 – 1 July 1884) was a Scottish American detective and spy, best known for creating the Pinkerton National Detective Agency.

Excerpt
So far as there being anything about Spiritualism to compel awe or attract any but weak-minded or “weak-moraled” people, the assumption is simply absurd; for the few illustrations given in the following pages will show how utterly preposterous the claim of supernatural power is, as applied to the cause of these “manifestations,” which are not, in themselves, first-class tricks, but which, when made mysterious and enshrouded with the element of superstitious fear—which all of us in some measure possess—lead crowds of inconsiderate people into unusual eccentricities, if not eventually into insane asylums, as in some painful instances of which the public are already well aware.

Thanks!

I think you have the wrong book Charlie. The header says "The Spiritualist and the Detectives" but the file is titled "The Somnambulist and the Detectives"