Lumbi was said to be the third dwelling of Melkor after he was captured by Tulkas. Gorgumoth, a hound of Mandos, guarded the chained Melkor in this castle.
In later notes, "Lumbi" was written as Lumfad.
Lumbi and Gorgumoth are not mentioned in The Silmarillion. The event in later books stays the same, however, wherein Melkor is chained by Angainor and cast behind the Door of Night.
- ↑ 1.0 1.1 The History of Middle-earth, Vol. 2: The Book of Lost Tales Part Two, VI: "The History of Eriol or Ælfwine and the End of the Tales"