§ Of the Sindar The Silmarillion

From Nogrod and Belegost the Naugrim came forth into Beleriand; and the Elves were filled with amazement, for they had believed themselves to be the only living things in Middle-earth that spoke with words or wrought with hands, and that all others were but birds and beasts. But they could understand no word of the tongue of the Naugrim, which to their ears was cumbrous and unlovely; and few ever of the Eldar have achieved the mastery of it But the Dwarves were swift to learn, and indeed were more willing to learn the Elventongue than to teach their own to those of alien race. Few of the Eldar went ever to Nogrod and Belegost, save Eöl of Nan Elmoth and Maeglin his son; but the Dwarves trafficked into Beleriand, and they made a great road that passed under the shoulders of Mount Dolmed and followed the course of the River Ascar, crossing Gelion at Sarn Athrad, the Ford of Stones, where battle after befell. Ever cool was the friendship between the Naugrim and the Eldar, though much profit they had one of the other; but at that time those griefs that lay between them had not yet come to pass, and King Thingol welcomed them. But the Naugrim gave their friendship more readily to the Noldor in after days than to any others of Elves and Men, because of their love and reverence for Aulë; and the gems of the Noldor they praised above all other wealth. In the darkness of Arda already the Dwarves wrought great works, for even from the first days of their Fathers they had marvellous skill with metals and with stone; but in that ancient time iron and copper they loved to work, rather than silver or gold.