The Silmarillion

But the dawn is brief and the day full often belies its promise; and now the time drew on to the great wars of the powers of the North, when Noldor and Sindar and Men strove against the hosts of Morgoth Bauglir, and went down in ruin. To this end the cunning lies of Morgoth that he sowed of old, and sowed ever anew among his foes, and the curse that came of the slaying at Alqualondë, and the oath of Fëanor, were ever at work. Only a part is here told of the deeds of those days, and most is said of the Noldor, and the Silmarils, and the mortals that became entangled in their fate. In those days Elves and Men were of like stature and strength of body, but the Elves had greater wisdom, and skill, and beauty; and those who had dwelt in Valinor and looked upon the Powers as much surpassed the Dark Elves in these things as they in turn surpassed the people of mortal race. Only to the realm of Doriath, whose queen Melian was of the kindred of Valar, did the Sindar come near to match the Calaquendi of the Blessed Realm.

Immortal were the Elves, and their wisdom waxed from age to age, and no sickness nor pestilence brought death to them. Their bodies indeed were of the stuff of Earth, and could be destroyed; and in those days they were more like to the bodies of Men, since they had not so long been inhabited by the fire of their spirit, which consumes them from within in the courses of time. But Men were more frail, more easily slain by weapon or mischance, and less easily healed; subject to sickness and many ills; and they grew old and died. What may befall their spirits after death the Elves know not. Some say that they too go to the halls of Mandos; but their place of waiting there is not that of the Elves, and Mandos under Ilúvatar alone save Manwë knows whither they go after the time of recollection in those silent halls beside the Outer Sea. None have ever come back from the mansions of the dead, save only Beren son of Barahir, whose hand had touched a Silmaril; but he never spoke afterward to mortal Men. The fate of Men after death, maybe, is not in the hands of the Valar, nor was all foretold in the Music of the Ainur.

In after days, when because of the triumph of Morgoth Elves and Men became estranged, as be most wished, those of the Elven-race that lived still in Middle-earth waned and faded, and Men usurped the sunlight. Then the Quendi wandered in the lonely places of the great lands and the isles, and took to the moonlight and the starlight, and to the woods and caves, becoming as shadows and memories, save those who ever and anon set sail into the West and vanished from Middle-earth. But in the dawn of years Elves and Men were allies and held themselves akin, and there were some among Men that learned the wisdom of the Eldar, and became great and valiant among the captains of the Noldor. And in the glory and beauty of the Elves, and in their fate, full share had the offspring of elf and mortal, Eärendil, and Elwing, and Elrond their child.

Chapter 13 Of the Return of the Noldor

It has been told that Fëanor and his sons came first of the Exiles to Middle-earth, and landed in the waste of Lammoth, the Great Echo, upon the outer shores of the Firth of Drengist And even as the Noldor set foot upon the strand their cries were taken up into the hills and multiplied, so that a clamour as of countless mighty voices filled all the coasts of the North; and the noise of the burning of the ships at Losgar went down the winds of the sea as a tumult of great wrath, and far away all who heard that sound were filled with wonder.

Now the flames of that burning were seen not only by Fingolfin, whom Fëanor had deserted in Araman, but also by the Orcs and the watchers of Morgoth. No tale has told what Morgoth thought in his heart at the tidings that Fëanor, his bitterest foe, had brought a host out of the West. It may be that he feared him little, for he had as yet no proof of the swords of the Noldor; and soon it was seen that he purposed to drive them back into the sea.