By way of further explanation, I desire to remind my readers how very difficult it is for those not familiar with the detective business to realize the masses of iniquity we are often obliged to unearth, unpalatable as the work may be and is. But while, from the nature of my business, my records are necessarily so exhaustive, and have been made so thoroughly minute, as to contain simply everything, good or bad, regarding an operation, and are, therefore, as records, reliable and true--though they thus become repositories of much that is vile--I have striven in every instance, while relating the truth and nothing but the truth, to speak of unpleasant things in as delicate a manner as possible, and in a way which, while plain enough to convey with proper force and directness the moral lessons that these developments cannot fail to impress upon the minds of all readers, might still leave no unclean thought behind them; and the only sense in which a charge that my "Detective Stories" were in any respect untrue might be sustained, would be in the fact that I have in numberless instances, for the very good reason mentioned, told immeasurably less, and never more, than the whole truth.
I make no assumption of having given in this book an exhaustive _exposé_ of modern spiritualism, and I wish it as well remembered that I have no more prejudice against the good there is in that ism than I have against the good there is in any other ism; but my experience with these people, which has been large, has invariably been against their honesty or social purity.
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.