[Maédhros]

1) The first one I can't find is on p. 15 in the last paragraph. (Talking about Morgoth) it says, "As he grew in Malice, and sent forth from himself an evil that he conceived in lies and creatures of wickedness, his power passed into them and was dispersed, and he himself became ever more earth-bound, unwilling to issue from his dark strongholds."

From the The Annals of Aman

§179 But Morgoth hated the new lights and was for a while confounded by this unlooked-for stroke of the Valar. Then he assailed Tilion, sending spirits of shadow against him, and there was strife in Ilmen beneath the paths of the stars, and Tilion was the victor: as he ever yet hath been, though still the pursuing darkness overtakes him at whiles. But Arien Morgoth feared with a great fear, and dared not to come nigh her, having indeed no longer the power. For as he grew in malice, and sent forth from himself the evil that he conceived in lies and creatures of wickedness, his power passed into them and was dispersed, and he himself became ever more earth-bound, unwilling to issue from his dark strongholds. With shadow therefore he hid himself and his servants from Arien, the glance of whose eyes they could not long endure, and the lands nigh his dwelling were shrouded in fumes and great clouds.

4) On p.25, in the second full paragraph, Beor speaks saying, "A darkness lies behind us; and we have turned our backs on it, and we do not desire to return thither even in thought. Westwards our hearts have been turned, and we believe that there we shall find Light." [A very similar passage, yet not an exact one, is in the published Silmarillion on p.141 (Hardback).]

The one that I found is this:
From War of the Jewels: Later Quentas 2

§8 Now the Eldar were beyond all other peoples skilled in tongues; and Felagund discovered also that he could read in the minds of Men such thoughts as they wished to reveal in speech, so that their words were easily interpreted. It was not long therefore before he could converse with Bëor; and while he dwelt with him they spoke much together. But when Felagund questioned Bëor concerning the arising of Men and their journeys, Bëor would say little; and indeed he knew little, for the fathers of his people had told few tales of their past and a silence had fallen upon their memory.
$9 'A darkness lies behind us,' Bëor said; 'and we have turned our backs on it, and we do not desire to return thither even in thought. Westwards our hearts have been turned, and we believe that there we shall find Light.'

And from the Published Silmarillion: Of the Coming of Men into the West

Now the Eldar were beyond all other peoples skilled in tongues; and Felagund discovered also that he could read in the minds of Men such thoughts as they wished to reveal in speech, so that their words were easily interpreted. It is said also that these Men had long had dealings with the Dark Elves east of the mountains, and from them had learned much of their speech; and since all the languages of the Quendi were of one origin, the language of Bëor and his folk resembled the Elven-tongue in many words and devices. It was not long therefore before Felagund could hold converse with Bëor; and while he dwelt with him they spoke much together. But when he questioned him concerning the arising of Men and their journeys, Bëor would say little; and indeed he knew little, for the fathers of his people had told few tales of their past and a silence had fallen upon their memory. 'A darkness lies behind us,' Bëor said; 'and we have turned our backs upon it, and we do not desire to return thither even in thought. Westwards our hearts have been turned, and we believe that there we shall find Light.'