一本《精灵宝钻》，他只被提过四次。
1. “……but at last he was smitten to the ground by Gothmog, Lord of Balrogs, whom Ecthelion after slew in Gondolin. ……”（Quenta Silmarillion，Chapter 13，“Of the Return of the Noldor”）
2. “……and his captains Ecthelion and Glorfindel guarded the flanks to right and left, so that none of the enemy should pass them by. ……”（Quenta Silmarillion，Chapter 20, “Of the Fifth Battle: Nirnaeth Arnoediad”）
3. “……and brought before Ecthelion of the Fountain, the warden of the great gate at the end of the climbing road; ……”（Quenta Silmarillion，Chapter 23，“Of Tuor and the Fall of Gondolin”）
4. “……of the battle of Ecthelion of the Fountain with Gothmog Lord of Balrogs in the very square of the King, where each slew the other，……”（Quenta Silmarillion，Chapter 23，“Of Tuor and the Fall of Gondolin”）


《未完的传说》中《关于图尔及他去往贡多林的旅程》一节，提到他的片断如下：
From Unfinished Tales，“Of Tuor and His Coming to Gondolin”：
...
Straightway there issued riders from the towers, but before those of the north tower came one upon a white horse; and he dismounted and strode towards them. And high and noble as was Elemmakil, greater and more lordly was Ecthelion, Lord of the Fountains, at that time Warden of the Great Gate. All in silver was he clad, and upon his shining helm there was set a spike of steel pointed with a diamond; and as his esquire took his shield it shimmered as if it were bedewed with drops of rain, that were indeed a thousand studs of crystal.
Elemmakil saluted him and said: "Here have I brought Voronwë Aranwion, returning from Balar; and here is the stranger that he has led hither, who demands to see the King."
Then Ecthelion turned to Tuor, but he drew his cloak about him and stood silent, facing him; and it seemed to Voronwë that a mist mantled Tuor and his stature was increased, so that the peak of his high hood over-topped the helm of the Elf-lord, as it were the crest of a grey sea-wave riding to the land. But Ecthelion bent his bright glance upon Tuor, and after a silence he spoke gravely, saying: "You have come to the Last Gate. Know then that no stranger who passes it shall ever go out again, save by the door of death."
"Speak not ill-boding! If the messenger of the Lord of Waters go by that door, then all those who dwell here will follow him. Lord of the Fountains, binder not the messenger of the Lord of Waters!"
Then Voronwë and all those who stood near looked again in wonder at Tuor, marvelling at his words and voice. And to Voronwë it seemed as if he heard a great voice, but as of one who called from afar off. But to Tuor it seemed that he listened to himself speaking, as if another spoke with his mouth.
For a while Ecthelion stood silent, looking at Tuor, and slowly awe filled his face, as if in the grey shadow of Tuor's cloak he saw visions from far away. Then he bowed, and went to the fence and laid hands upon it, and gates opened inward on either side of the pillar of the Crown. Then Tuor passed through, and coining to a high sward that looked out over the valley beyond, he beheld a vision of Gondolin amid the white snow. And so entranced was he that for long he could look at nothing else; for he saw before him at last the vision of his desire out of dreams of longing.
Thus he stood and spoke no word. Silent upon either hand stood a host of the army of Gondolin; all of the seven kinds of the Seven Gates were there represented; but their captains and chieftains were upon horses, white and grey. Then even as they gazed on Tuor in wonder, his cloak fell down, and he stood there before them in the mighty livery of Nevrast. And many were there who had seen Turgon himself set these things upon the wall behind the High Seat of Vinyamar.
Then Ecthelion said at last: "Now no further proof is needed; and even the 

在《失落传说之书》下册，The Fall of Gondolin一节，有多处提到他：
“Then came there from the south of the city the people of the Fountain, and Ecthelion was their lord, and silver and diamonds were their delight; and swords very long and bright and pale did they wield, and they went into battle to the music of flutes.”
“Then did King Turgon call a council, and thither fared Tuor and Meglin as royal princes; and Duilin came with Egalmoth and Penlod the tall, and Rog strode thither with Galdor of the Tree and golden Glorfindel and Ecthelion of the voice of music.”
“But even as their messengers were sped they heard a sweet music that was played amid the host of the Gondothlim and they feared what it might mean; and lo! there came Ecthelion and the people of the Fountain whom Turgon till now had held in reserve, for he watched the most of that affray from the heights of his tower. Now marched these folk to a great playing of their flutes, and the crystal and silver of their array was most lovely to see amid the red light of the fires and the blackness of the ruins. Then on a sudden their music ceased and Ecthelion of the fair voice shouted for the drawing of swords, and before the Orcs might foresee his onslaught the flashing of those pale blades was amongst them. 'Tis said that Ecthelion's folk there slew more of the goblins than fell ever in all the battles of the Eldalie with that race, and that his name is a terror among them to this latest day, and a warcry to the Eldar.
Now it is that Tuor and the men of the Wing fare into the fight and range themselves beside Ecthelion and those of the Fountain, and the twain strike mighty blows and ward each many a thrust from the other, and harry the Orcs so that they win back almost to the gate. But there behold a quaking and a trampling, for the dragons labour mightily at beating a path up Amon Gwareth and at casting down the walls of the city; and already there is a gap therein and a confusion of masonry where the ward-towers have fallen in ruin. Bands of the Swallow and of the Arch of Heaven there fight bitterly amid the wreck or contest the walls to east and west with the foe; but even as Tuor comes nigh driving the Orcs, one of those brazen snakes heaves against the western wall and a great mass of it shakes and falls, and behind comes a creature of fire and Balrogs upon it. Flames gust from the jaws of that worm and folk wither before it, and the wings of the helm of Tuor are blackened, but he stands and gathers about him his guard and all of the Arch and Swallow he can find, whereas on his right Ecthelion rallies the men of the Fountain of the South. Now the Orcs again take heart from the coming of the drakes, and they mingle with the Balrogs that pour about the breach, and they assail the Gondothlim grievously. There Tuor slew Othrod a lord of the Orcs cleaving his helm, and Balcmeg he hewed asunder,
and Lug he smote with his axe that his limbs were cut from beneath him at the knee, but Ecthelion shore through two captains of the goblins at a sweep and cleft the head of Orcobal their chiefest champion to his teeth; and by reason of the great doughtiness of those two lords they came even unto the Balrogs. Of those demons of power Ecthelion slew three, for the brightness of his sword cleft the iron of them and did hurt to their fire, and they writhed; yet of the leap of that axe Dramborleg that was swung by the hand of Tuor were they still more afraid, for it sang like the rush of eagle's wings in the air and took death as it fell, and five of them went down before it.


But so it is that few cannot fight always against the many, and Ecthelion's left arm got a sore rent from a whip of the Balrog's and his shield fell to earth even as that dragon of fire drew nigh amid the ruin of the walls. Then Ecthelion must lean on Tuor, and Tuor might not leave him, though the very feet of the trampling beast were upon them, and they were like to be overborne: but Tuor hewed at a foot of the creature so that flame spouted forth, and that serpent screamed, lashing with its tail; and many of both
Orcs and Noldoli got their death therefrom. Now Tuor gathered his might and lifted Ecthelion, and amid a remnant of the folk got thereunder and escaped the drake; yet dire was the killing of men that beast had wrought, and the Gondothlim were sorely shaken. Thus it was that Tuor son of Peleg gave before the foe, fighting as he yielded ground, and bore from that hattle Ecthelion of the Fountain, but the drakes and the foemen held half the city and all the north of it. Thence marauding bands fared about the streets and did much ransacking, or slew in the dark men and women and children, and many, if occasion let, they bound and led back and flung in the iron chambers amid the dragons of iron, that they might drag them afterward to be thralls of Melko.
Now Tuor reached the Square of the Folkwell by a way entering from the north, and found there Galdor denying the western entry by the Arch of Inwe to a horde of the goblins, but about him was now but a few of those men of the Tree. There did Galdor become the salvation of Tuor, for he fell behind his men stumbling beneath Ecthelion over a body that lay in the dark, and the Orcs had taken them both but for the sudden rush of that champion and the dint of his club.
There were the scatterlings of the guard of the Wing and of the houses of the Tree and the Fountain, and of the Swallow and the Arch, welded to a good battalion, and by the counsel of Tuor they gave way out of that Place of the Well, seeing that the Square of the King that lay next was the more defensible. Now that place had aforetime contained many beautiful trees, both oak and poplar, around a great well of vast depth and great purity of
water; yet at that hour it was full of the riot and ugliness of those hideous people of Melko, and those waters were polluted with their carcases.
Thus comes the last stout gathering of those defenders in the Square of the Palace of Turgon. Among them are many wounded and fainting, and Tuor is weary for the labours of the night and the weight of Ecthelion who is in a deadly swoon.”


“Tuor now drank of the great fountain and was refreshed, and loosening Ecthelion's helm gave him to drink, splashing his face that his swoon left him.”
“Then there was carnage at the barriers, and Egalmoth and Tuor went from place to place of the defence, but Ecthelion lay by the fountain; and that stand was the most stubborn-valiant that is remembered in all the songs or in any tale. Yet at long last a drake bursts the barrier to the north -- and there had once been the issue of the Alley of Roses and a fair place to see or to walk in, but now there is but a lane of blackness and it is filled with noise. Tuor stood then in the way of that beast, but was sundered from Egalmoth, and they pressed him backward even to the centre of
the square nigh the fountain. There he became weary from the strangling heat and was beaten down by a great demon, even Gothmog lord of Balrogs, son of Melko. But lo! Ecthelion, whose face was of the pallor of grey steel and whose shield-arm hung limp at his side, strode above him as he fell; and that Gnome drave at the demon, yet did not give him his death, getting rather a wound to his sword-arm that his weapon left his grasp. Then leapt
Ecthelion lord of the Fountain, fairest of the Noldoli, full at Gothmog even as he raised his whip, and his helm that had a spike upon it he drave into that evil breast, and he twined his legs about his foeman's thighs; and the Balrog yelled and fell forward; but those two dropped into the basin of the king's fountain which was very deep. There found that creature his bane; and Ecthelion sank steel-laden into the depths, and so perished the lord of the Fountain after fiery battle in cool waters.
“Now Tuor had arisen when the assault of Ecthelion gave him space, and seeing that great deed he wept for his love of that fair Gnome of the Fountain, but being wrapped in battle he scarce cut his way to the folk about the palace. There seeing the wavering of the enemy by reason of the dread of the fall of Gothmog the marshal of the hosts, the royal house laid on and the king came down in splendour among them and hewed with them, that they swept again much of the square, and of the Balrogs slew even two
score, which is a very great prowess indeed: but greater still did they do, for they hemmed in one of the Fire-drakes for all his flaming, and forced him into the very waters of the fountain that he perished therein. Now this was the end of that fair water; and its pools turned to steam and its spring was dried up, and it shot no more into the heaven, but rather a vast column of vapour arose to the sky and the cloud therefrom floated over all the land.”


Here they made one meal of scanty food and broken meats; and Earendel quenched his thirst and played beside a little brook. Then said he to his mother: "Mother Idril, I would we had good Ecthelion of the Fountain here to play to me on his flute, or make me willow-whistles! Perchance he has gone on ahead?" But Idril said nay, and told what she had heard of his end. Then said
Earendel that he cared not ever to see the streets of Gondolin again, and he wept bitterly; but Tuor said that he would not again see those streets, "for Gondolin is no more".
这部分的全文译文可以在龙骑士城堡找到，译者Gilgaer。（http冒号//www。cndkc。net/bbs/thread-25776-1-3.html）


《中洲历史》后十卷中提及他的地方不多，除去与《精灵宝钻》中雷同的部分，主要是名字释义。
《中洲历史》第五卷：
EK-, EKTE- spear. Q ehte   spear, ehtar   spearman. N   aith spear-
point, eg thorn, cf. Egthelion, Ecthelion [STELEG].
STELEG- N thela point (of spear); egthel, ecthel, cf. Ecthelion (see EK). [An illegible word after ecthel may read 'same', i.e. the same
meaning as thela.]
《中洲历史》第十一卷：
And Turgon appointed three lords of his household...
On B(i) only, my father pencilled with reference to these opening words he names Glorfindel, Egalmoth, and Ecthelion, and also 'On etymologies of Egalmoth and Ecthelion see note'. 【注：显然托老后来打算放弃这个由三位领主护送Aredhel出城的设定。】
Ecthelion must be similarly from Aegthelion. Latter element is a derivative of V stel ‘remain firm’. The form with prefix ‘sundoma’, estel, was used in Q and S for ‘hope’ - sc. a temper of mind, steady, fixed in purpose, and difficult to dissuade and unlikely to fall into despair or abandon its purpose. The nprefixed stel- gave thel ‘intend, mean, purpose, resolve, will’. So Q ? pelma ‘a fixed idea,..., will.’


嗯.......原来如此，受教！