According to these manifold distinctions in evil, and their nearer or more remote distances from one another, are the several hells divided and regulated with the utmost exactness and congruity. There are also hells under hells, communicating with one another, some by passages, and some by exhalations, according to the agreement or affinity betwixt evil and evil. That the hells are so many and various appears from its being given me to know, that under every mountain, hill, rock, plain and valley, there were particular hells of different extent in length, breadth, and depth. In a word, both heaven and the world of spirits may be considered as convexities, under which are arrangements of those infernal mansions. So much concerning the plurality of hells.
Emanuel Swedenborg, Treatise Concerning Heaven and Hell, Containing a Relation of many Wonderful Things therein, as heard and seen by the Author.
London: Printed and Sold by James Phillips, George Yard, Lombard Street, 1778.