The Phantom World or the Philosophy of Spirits

Among the many phases presented by human credulity, few are more interesting than those which regard the realities of the invisible world. If the opinions which have been held on this subject were written and gathered together they would form hundreds of volumes if they were arranged and digested they would form a few, but most important. It is not merely because there is in almost every human error a substratum of truth, and that the more important the subject the more important the substratum, but because the investigation will give almost a history of human aberrations, that this otherwise unpromising topic assumes so high an interest. The superstitions of every age, for no age is free from them, will present the popular modes of thinking in an intelligible and easily accessible form, and may be taken as a means of gauging (if the expression be permitted)