“Many and multiform are the dim horrors of Earth, infesting her ways from the prime. They sleep beneath the unturned stone; they rise with the tree from its roots; they move beneath the sea and in subterranean places; they dwell in the inmost adyta; they emerge betimes from the shutten sepulcher of haughty bronze and the low grave that is sealed with clay. There be some that are long known to man, and others as yet unknown that abide the terrible latter days of their revealing. Those which are the most dreadful and the loathliest of all are haply still to be declared. But among those that have revealed themselves aforetime and have made manifest their veritable presence, there is one which may not openly be named for its exceeding foulness. It is that spawn which the hidden dweller in the vaults has begotten upon mortality.”
Clark Ashton Smith, “The Nameless Offspring” (1932).