Krully

Krully was an individual from one universe, who met his fate in a mountain cave. There allegedly existed a secret marble tunnel between that cave and the Library of Hawk Manor. (PROSE: Our Strange and Wonderful House: The Library)

Behind the scenes

As pointed out in comments by Elsha Hawk, the Hawk Manor mythos, including Krully, predated Our Strange and Wonderful House, originating in works published on Ficlets. He was the avatar of Ficlets author Krulltar. Hawk's own author bio on Ficly included a quote jokingly attributed to Krully.