At the most remote end of the crypt there appeared another less spacious. Its walls had been lined with human remains, piled to
the vault overhead, in the fashion of the great catacombs of Paris. Three sides of this interior crypt were still ornamented in this manner. From the fourth side the bones had been thrown down, and lay promiscuously upon the earth, forming at one point a mound of some size. The passage above provides a description of which story element?
