The public for whom Poe wrote, though grossly unappreciative of his art, was by no means unaccustomed to the horrors with which he dealt. America, besides inheriting the usual dark folklore of Europe, had an additional fund of weird associations to draw upon; so that spectral legends had already been recognized as fruitful subject-matter for literature. Charles Brockden Brown had achieved phenomenal fame with his Radcliffian romances, and Washington Irving's lighter treatment of eerie themes had quickly become classic. This additional fund proceeded, as Paul Elmer Moore has pointed out, from the keen spiritual and theological interests of the first colonists, plus the strange and forbidding nature of the scene into which they were plunged, the vast and gloomy virgin forest in whose perpetual twilight all terrors might well lurk; the hordes of coppery Indians whose strange, saturnine visages and violent customs hinted strongly at traces of infernal origin; the free rein given under the influence of Puritan theocracy to all manner of notions respecting man's relation to the stern and vengeful God of the Calvinists, and to the sulphureous Adversary of that God, about whom so much was thundered in the pulpits each Sunday; and the morbid introspection developed by an isolated backwoods life devoid of normal amusements and of the recreational mood, harassed by commands for theological self-examination, keyed to unnatural emotional repression, and forming above all a mere grim struggle for survival--all these things conspired to produce an environment in which the black whisperings of sinister grandams were heard far beyond the chimney corner, and in which tales of witchcraft and unbelievable secret monstrosities lingered long after the dread days of the Salem nightmare.