The Silmarillion

Then Eöl looked into the eyes of King Turgon, and he was not daunted, but stood long without word or movement while a still silence fell upon the hall; and Aredhel was afraid, knowing that he was perilous. Suddenly, swift as serpent, he seized a javelin that he held hid beneath his cloak and cast it at Maeglin, crying:

'The second choice I take and for my son also! You shall not hold what is mine!'

But Aredhel sprang before the dart, and it smote her in the shoulder; and Eöl was overborne by many and set in bonds, and led away, while others tended Aredhel. But Maeglin looking upon his father was silent.

It was appointed that Eöl should be brought on the next day to the King's judgement; and Aredhel and Idril moved Turgon to mercy. But in the evening Aredhel sickened, though the wound had seemed little, and she fell into the darkness, and in the night she died; for the point of the javelin was poisoned, though none knew it until too late.

Therefore when Eöl was brought before Turgon he found no mercy; and they led him forth to the Caragdûr, a precipice of black rock upon the north side of the hill of Gondolin, there to cast him down from the sheer walls of the city. And Maeglin stood by and said nothing; but at the last Eöl cried out: 'So you forsake your father and his kin, ill-gotten son! Here shall you fail of all your hopes, and here may you yet die the same death as I.'

Then they cast Eöl over the Caragdûr, and so he ended, and to all in Gondolin it seemed just; but Idril was troubled, and from that day she mistrusted her kinsman. But Maeglin prospered and grew great among the Gondolindrim, praised by all, and high in the favour of Turgon; for if he would learn eagerly and swiftly all that he might, he had much also to teach. And he gathered about him all such as had the most bent to smithcraft and mining; and he sought in the Echoriath (which are the Encircling Mountains), and found rich lodes of ore of divers metals. Most he prized the hard iron of the mine of Anghabar in the north of the Echoriath, and thence he got a wealth of forged metal and of steel, so that the arms of the Gondolindrim were made ever stronger and more keen; and that stood them in good stead in the days to come. Wise in counsel was Maeglin and wary, and yet hardy and valiant at need. And that was seen in after days: for when in the dread year of the Nirnaeth Arnoediad Turgon opened his leaguer and marched forth to the help of Fingon in the north, Maeglin would not remain in Gondolin as regent of the King, but went to the war and fought beside Turgon, and proved fell and fearless in battle.

Thus all seemed well with the fortunes of Maeglin, who had risen to be mighty among the princes of the Noldor, and greatest save one in the most renowned of their realms. Yet he did not reveal his heart: and though not all things went as he would he endured it in silence, hiding his mind so that few could read it, unless it were Idril Celebrindal. For from his first days in Gondolin he had borne a grief, ever worsening, that robbed him of all joy: he loved the beauty of Idril and desired her, without hope. The Eldar wedded not with km so near, nor ever before had any desired to do so. And however that might be, Idril loved Maeglin not at all; and knowing his thought of her she loved him the less. For it seemed to her a thing strange and crooked in him, as indeed the Eldar ever since have deemed it: an evil fruit of the Kinslaying, whereby the shadow of the curse of Mandos fell upon the last hope of the Noldor. But as the years passed still Maeglin watched Idril, and waited, and his love turned to darkness in his heart. And he sought the more to have his will in other matters, shirking no toil or burden, if he might thereby have power.

Thus it was in Gondolin; and amid all the bliss of that realm, while its glory lasted, a dark seed of evil was sown.

Chapter 17 Of the Coming of Men into the West

When three hundred years and more were gone since the Noldor came to Beleriand, in the days of the Long Peace, Finrod Felagund lord of Nargothrond journeyed east of Sirion and went hunting with Maglor and Maedhros, sons of Fëanor. But he wearied of the chase and passed on alone towards the mountains of Ered Lindon that he saw shining afar; and taking the Dwarf-road he crossed Gelion at the ford of Sarn Athrad, and taming south over the upper streams of Ascar, he came into the north of Ossiriand.