From Tolkien's letters #210:
Quote:
The Balrog never speaks or makes any vocal sound at all. Above all he does not laugh or sneer.
Letter #144
Quote:
The Balrog is a survivor from the Silmarillion and the legends of the First Age. So is Shelob. The Balrog, of whom the whips were the chief weapons, were primeval spirits of destroying fire, chief servants of the primeval Dark Power of the First Age. They were supposed to have been destroyed in the overthrow of Thangorodrim, his fortress in the north. But it is here found (there is usually a hang-over especially of evil from one age to another) that one has escaped and taken refuge under the mountains of Hithaeglin ( the Misty Mountains). It is observable that only the Elf knows what the thing is - and doubtless Gandalf.
From: The Silmarillion - Valaquenta - Of the Enemies
Quote:
For of the Maiar many were drawn to his splendor in the days of the greatness, and remained in that allegiance down into his darkness, and others he corrupted afterwards to his service with his lies and treacherous gifts. Dreadful among these spirits were the Valaraukar, the scourges of fire that in Middle-earth were called the Balrogs, demons of terror.
From: The Book of Lost Tales Part 1 The Coming of the Valar.
Quote:
....and that Melko has a son ('by Ubandi") called Kosomot: this, it will emerge later, was Gothmog Lord of Balrogs, whom Ecthelion slew in Gondolin.
Letter #144
Quote:
Shelob (English representing C.S. 'She-lob' = female spider) is a translation of Elvish Ungol 'spider'. She is represented in vol II p. 332 as descendant of the giant spiders of the glens of Nandungorthin which come into the legends of the First Age, especiallly into the chief of them, the tale of Beren and Luthien.
Letter #144
Quote:
The giant spiders were themselves only the offspring of Ungoliante the primeval devourer of light, that in spider-form assisted the Dark Power, but ultimately quarrelled with him. There is thus no alliance between Shelob and Sauron, the Dark Power's deputy, only a common hatred.
Two Towers
Quote:
Shelob was the last child of Ungoliant to trouble the unhappy world.
[Edited on 19/1/2003 by Rednell]