The Ent Gnarlstump desires to build a memorial to the Entwives before he leaves the Brown Lands.
'Hoom, little ${RACE}, I could use your help once more. I would, hoom-hom, build in this place a -- how would you say it? -- a memorial in honour of the Entwives. Yes, that is the word for it: memorial.
'I would not touch the stones of the Entwives' gardens, but there is other stone to be had in this land, ta-rum! Trolls, foul beasts made by Morgoth in mockery of Ents, dwell in this land. Occasionally, they become trapped in the sunlight and turn to stone.
'Gather this troll-stone and bring it to me. It is fitting, I think, for the foul mockeries to become a memorial.'
Troll-stone can be found throughout the Brown Lands, in the desolation of the Entwives' gardens, and at the Stone-hole, north of Gnarlstump's camp.
Gnarlstump has asked you to gather troll-stone so that he can build a memorial to the Entwives.
Gnarlstump is at his camp near the desolation of the Entwives' gardens in the Brown Lands.
You should bring the troll-stone you collected to Gnarlstump.