The Elves of Ered Luin remain to prepare for the last voyage of the Elves from Middle-earth, but also to ward Middle-earth from the evils that remain.
'If wights stir the bones of the ancient Edain, then an evil has arisen in these mountains which we should all fear. The fell spirits that stir the bones of the Dead are servants of Angmar, of the Witch-king of old, and of the Shadow in the East. I must ask you to seek out this evil and put whatever end you may to it before its darkness spreads.
'Take this Elf-stone to Glamír. He dwells now in the ruins to the north-east of Gondamon at the southern end of the Grimwater.'
Glamír dwells at the ruins north-east of Gondamon, at the southern end of the Grimwater.
Gailthin gave you an Elf-stone and sent you to an Elf named Glamír, who may be able to help you against the wights of Haudh Lin.