Nauglath

The Nauglith are one of two wicked dwarves] clans appearing in The Book of Lost Tales. They were ruled by Naugladur of Norgrod. They are the kinds of the Indrafangs (Longbeards).

The Nauglith can also generically refer to the dwarves as a whole in the Lost Tales.

Background
The earliest known legends suggest that Melko created the Uvanimor, bred from the earth, who were monsters, giants, ogres, the Nautar and the Naugleth. The Dwarves appear to be one of the [Uvanimor related to Goblins. Fangli/Fankil/Fukil (perhaps Sauron), the child of Melko and his servent, entered into the world perverting men. They fought the Ilkorins (elves). The Ermon (Edain?) allied with Nuin at the Battle of Palisor. Fangli's forces were either defeated, but some may have fled away becoming wild and savage tribes who worshiped Fangli and Melko. Thereafter Pelisor was possessed by Fangli and his hosts of Naugleth (or Dwarves). Later Fankil with the Dwarves and Goblins went among Men, and bred estrangement between them and the elves; and many Men aided the Dwarves. Such that only the Ermon alone stood by the fairies in the first war of Goblins and Elves (aka Dwarves and Men).

The Nauglith are the kin of the Indrafangs/Indravangs (the Longbeards). The dwarves are a strange race and none knew exactly where the came from. They served neither Melko, nor Manwe, and they had no concern for Elves or men. Some claim they had not heard of Iluvitar, or in hearing disbelieve. In crafts and sciences and in the knowledge of virtues of all things in the earth or under the water none excel them; yet they dwelt beneath the ground in caves and tunneled towns; Nogrod was the mightiest of these. It is said they are very old, and that no child comes among them, nor are they able to laugh. They are squat ins stature, and yet are strong, and their beards reach to their toes. However, the beards of the Indrafangs are the longest of all, forked, and they bound them to their middles as they walked abroid. All these creatures have Men called dwarves, and they say that crafts and cunning surpass that of the Gnomes (Noldor elves), there is however little beauty in their works. It is said that some of the Gnomes joined in league with the Dwarves of Nogrod. The Dwarves were freely in trade with the Noldoli selling swords, coats of mail, and other smithwork of great skill. There was a great traffic between the people, and also with the Orcs and soldiers of Melko as well.

The dwarves desired the gold of the elves, and asked the king to allow them to work their craft on their treasuries. It was agreed under the guidence of Ufedhin the Noldoli (and his own craft skill), that the gold and one of the Silmarils would be loaned to the dwarves in Norgrod to work their skills on. To which the Dwarves claimed they would fashion things for the adornement of the king and queen such that they had never seen, nor any Gnome or Dwarf had made yet.

The king broke his agreement with Ufedhin and the dwarves, capturing them. Telling them they would remain hostages until the treasures had been returned to his halls. He mistrusted them and thought they were thieves, or that their greed would turn them into thieves. In place of Ufedhin the gold was brought to Nogrod by one of the craftmen's companions. Meanwhile Ufedhin manipulated the king with descriptions of the treasures they would make, and began to weave dark plots in order to ensnare the king in avarice and revenge for his capture.

In these legends, Mim the fatherless is the captain of the guard of Glorund the Drake (later known as Glauring) one of the greater minions of Melko. Mim is put in charge of guarding the great dragon's treasure in his absence. Following Glorund's death by Turin, Urin comes to Glauring's hoard. Mim uses dark spells to curse the treasures so that no others may touch it without troubles following them. Urin smites him soon after the curse, and takes the treasures back with him to Doriath.