south of Aelin-uial the land fell suddenly and steeply; and all the lower fields of Sirion were divided from the upper fields by this fall, which to one looking from the south northward appeared as an endless chain of hills running from Eglarest beyond Narog in the west to Amon Ereb in the east, within far sight of Gelion. Narog came through these hills in a deep gorge, and flowed over rapids bat had no fall, and on its western bank the land rose into the great wooded highlands of Tauren-Faroth. On the west side of this gorge, where the short and foaming stream Ringwil tumbled headlong into Narog from the High Faroth, Finrod established Nargothrond. But some twenty-five leagues east of the gorge of Nargothrond Sirion fell from the north in a mighty fall below the Meres, and then he plunged suddenly underground into great tunnels that the weight of his falling waters delved; and he issued again three leagues southward with great noise and smoke through rocky arches at the foot of the hills which were called the Gates of Sirion.
This dividing fall was named Andram, the Long Wall, from Nargothrond to Ramdal, the Wall's End, in East Beleriand. But in the east it became ever less sheer, for the vale of Gelion sloped steadily southward, and Gelion had neither fall nor rapids throughout his course, but was ever swifter than was Sirion. Between Ramdal and Gelion there stood a single hill of great extent and gentle slopes, but seeming mightier than it was, for it stood alone; and that hill was named Amon Ereb. Upon Amon Ereb died Denethor, lord of the Nandor that dwelt in Ossiriand, who marched to the aid of Thingol against Morgoth in those days when the Orcs first came down in force, and broke the starlit peace of Beleriand; and upon that hill Maedhros dwelt after the great defeat. But south of the Andram, between Sirion and Gelion, was a wild land of tangled forest in which no folk went, save here and there a few Dark Elves wandering; Taur-im-Duinath it was named, the Forest between the Rivers.
Gelion was a great river; and he rose in two sources and had at first two branches; Little Gelion that came from the Hill of Himring, and Greater Gelion that came from Mount Rerir. From the meeting of his arms he flowed south for forty leagues before he found his tributaries; and before he found the sea he was twice as long as Sirion, though less wide and full, for more rain fell in Hithlum and Dorthonion, whence Sirion drew his waters, than in the east. From Ered Luin flowed the six tributaries of Gelion: Ascar (that was after named Rathl?riel), Thalos, Legolin, Brilthor, Duilwen, and Adurant, swift and turbulent streams, falling steeply from the mountains; and between Ascar in the north and Adurant in the south, and between Gelion and Ered Luin, lay the far green country of Ossiriand, the Land of Seven Rivers. Now at a point nearly midway in its course the stream of Adurant divided and then joined again; and the island that its waters enclosed was named Tol Galen, the Green Isle. There Beren and L?thien dwelt after their return.
In Ossiriand dwelt the Green-elves, in the protection of their rivers; for after Sirion Ulmo loved Gelion above all the waters of the western world. The woodcraft of the Elves of Ossiriand was such that a stranger might pass through their land from end to end and see none of them. They were clad in green in spring and summer, and the sound of their singing could be heard even across the waters of Gelion; wherefore the Noldor named that country Lindon, the land of music, and the mountains beyond they named Ered Lindon, for they first saw them from Ossiriand.
East of Dorthonion the marches of Beleriand were most open to attack, and only hills of no great height guarded the vale of Gelion from the north. In that region, upon the March of Maedhros and in the lands behind, dwelt the sons of F?anor with many people; and their riders passed often over the vast northern plain, Lothlann the wide and empty, east of Ard-galen, lest Morgoth should attempt any sortie towards East Beleriand. The chief citadel of Maedhros was upon the Hill of Himring, the Ever-cold; and that was wide-shouldered, bare of trees, and flat upon its summit, surrounded by many lesser hills. Between Himring and Dorthonion there was a pass, exceeding steep upon the west, and that was the Pass of Aglon, and was a gate unto Doriath; and a bitter wind blew ever through it from the north. But Celegorm and Curufin fortified Aglon and held it with great strength, and all the land of Himlad southward between the River Aros that rose in Dorthonion and his tributary Celon that came from Himring.
Between the arms of Gelion was the ward of Maglor, and here in one place the hills failed altogether: there it was that the Orcs came into East Beleriand before the Third Battle. Therefore the Noldor held strength of cavalry In the plains at that place; and the people of Caranthir fortified the mountains to the east of Maglor's Gap. There Mount Rerir, and about it many lesser heights, stood out from the main range of Ered Lindon westward; and in the angle between Rerir and Ered Lindon there was a lake, shadowed by mountains on all sides save the south. That was Lake Helevorn, deep and dark, and beside it Caranthir had his abode; but all the great land between Gelion and the mountains, and between Rerir and the River Ascar, was called by the Noldor Thargelion, which signifies the Land beyond Gelion, or Dor Caranthir, the Land of Caranthir; and it was here that the Noldor first met the Dwarves. But Thargelion was before called by the Grey-elves Talath Rh?nen, the East Vale.
Thus the sons of F?anor under Maedhros were the lords of East Beleriand, but their people were in that time mostly in the north of the land, and southward they rode only to hunt in the greenwoods. But there Amrod and Amras had their abode, and they came seldom northward while the Siege lasted; and there also other of the Elf-lords would ride at times, even from afar, for the land was wild but very fair. Of these Fin-rod Felagund came most often, for he had great love of wandering and he came even into Ossiriand, and won the friendship of the Green-elves. But none of the Noldor went ever over Ered Lindon, while their realm lasted; and little news and late came into Beleriand of what passed in the regions of the East.
The Silmarillion
Chapter 15
Of the Noldor in Beleriand
It has been told how by the guidance of Ulmo Turgon of Nevrast discovered the hidden vale of Tumladen; and that (as was after known) lay east of the upper waters of Sirion, in a ring of mountains tall and sheer, and no living thing came there save the eagles of Thorondor. But there was a deep way under the mountains delved in the darkness of the world by waters that flowed out to join the streams of Sirion; and this way Turgon found, and so came to the green plain amid the mountains, and saw the island-hill that stood there of hard smooth stone; for the vale had been a great lake in ancient days. Then Turgon knew that he had found the place of his desire, and he resolved to build there a fair city, a memorial of Tirion upon T?na; but he returned to Nevrast, and remained there in peace, though he pondered ever in his thought how he should accomplish his design.
Now after the Dagor Aglareb the unquiet that Ulmo set in his heart returned to him, and he summoned many of the hardiest and most skilled of his people, and led them secretly to the hidden vale, and there they began the building of the city that Turgon had devised; and they set a watch all about it, that none might come upon their work from without, and the power of Ulmo that ran in Sirion protected them. But Turgon dwelt still for the most part in Nevrast, until it came to pass that at last the city was full-wrought, after two and fifty years of secret toil. It is said that Turgon appointed its name to be Ondolind? in the speech of the Elves of Valinor, the Rock of the Music of Water, for there were fountains upon the hill; but in the Sindarin tongue the name was changed, and it became Gondolin, the Hidden Rock. Then Turgon prepared to depart from Nevrast and leave his halls in Vinyamar beside the sea; and there Ulmo came to him once again, and spoke with him. And he said: 'Now thou shalt go at last to Gondolin, Turgon; and I will maintain my power in the Vale of Sirion, and in all the waters therein, so that none shall mark thy going, nor shall any find there the hidden entrance against thy will. Longest of all the realms of the Eldali? shall Gondolin stand against Melkor. But love not too well the work of thy hands and the devices of thy heart; and remember that the true hope of the Noldor lieth in the West and cometh from the Sea.'
And Ulmo warned Turgon that he also lay under the Doom of Mandos, which Ulmo had no power to remove. 'Thus it may come to pass,' he said, 'that the curse of the Noldor shall find thee too ere the end, and treason awake within thy walls. Then they shall be in peril of fire. But if this peril draweth nigh indeed, then even from Nevrast one shall come to warn thee, and from him beyond ruin and fire hope shall be born for Elves and Men. Leave therefore in this house arms and a sword, that in years to come he may find them, and thus shalt thou know him, and not be deceived.' And Ulmo declared to Turgon of what kind and stature should be the helm and mail and sword that he left behind.
Then Ulmo returned to the sea, and Turgon sent forth all his people, even to a third part of the Noldor of Fingolfin's following, and a yet greater host of the Sindar; and they passed away, compa