The End

Now all these things were achieved for the most part by the counsel and vigilance of Mithrandir, and in the last few days he was revealed as a lord of great reverence, and clad in white he rode into battle; but not until the time came for him to depart was it known that he had long guarded the Red Ring of Fire. At the first that Ring had been entrusted to Círdan, Lord of the Havens; but he had surrendered it to Mithrandir, for he knew whence he came and whither at last he would return.

'Take now this Ring,' he said; 'for thy labours and thy cares will be heavy, but in all it will support thee and defend thee from weariness. For this is the Ring of Fire, and herewith, maybe, thou shalt rekindle hearts to the valour of old in a world that grows chill. But as for me, my heart is with the Sea, and I will dwell by the grey shores, guarding the Haves until the last ship sails. Then I shall await thee.'

White was that ship and long it was a-building, and long it awaited the end of which Círdan had spoken. But when all these things were done, and the Heir of Isildur had taken up the lordship of Men, and the dominion of the West had passed to him, then it was made plain that the power of the Three Rings also was ended, and to the Firstborn the world grew old and grey. In that time the last of the Noldor set sail from the Havens and left Middle-earth for ever. And latest of all the Keepers of the Three Rings rode to the Sea, and Master Elrond took there the ship that Círdan had made ready. In the twilight of autumn it sailed out of Mithlond, until the seas of the Bent World fell away beneath it, and the winds of the round sky troubled it no more, and borne upon the high airs above the mists of the world it passed into the Ancient West, and an end was come for the Eldar of story and of song.

~J. R. R. Tolkien
the Silmarillion