§ Of the Rings of Power and the Third Age The Silmarillion

Others of the Eldar there were who crossed the mountains of Ered Luin in that age and passed into the inner lands. Many of these were Teleri, survivors of Doriath and Ossiriand; and they established realms among the Silvan Elves in woods and mountains far from the sea, for which nonetheless they ever yearned in their hearts. Only in Eregion, which Men called Hollin, did Elves of Noldorin race establish a lasting realm beyond the Ered Luin. Eregion was nigh to the great mansions of the Dwarves that were named Khazad-dûm, but by the Elves Hadhodrond, and afterwards Moria. From Ost-in-Edhil, the city of the Elves, the highroad ran to the west gate of Khazad-dûm, for a friendship arose between Dwarves and Elves, such as has never elsewhere been, to the enrichment of both those peoples. In Eregion the craftsmen of the Gwaith-i-Mírdain, the People of the Jewel-smiths, surpassed in cunning all that have ever wrought, save only Fëanor himself; and indeed greatest in skill among them was Celebrimbor, son of Curufin, who was estranged from his father and remained in Nargothrond when Celegorm and Curufin were driven forth, as is told in the Quenta Silmarillion.