Goblins were discovered within Edhelion and Elladan fought many of them. He is troubled by what you discovered when you searched the bodies: each of the slain goblins carried dwarf-made pick-axes.
'There is a party of Longbeards that has recently come from Erebor. Their leader, Dwalin, was a member of Thorin's Company, which journeyed forth long ago on the Quest of Erebor, and he is a friend of my father's.
'You will find Dwalin standing at Frerin's Court, west of here within the vale. You will need to make your way down the mountainside and across the dwarf-paths to reach him. Bring him the picks and tell him of the goblins.
'Should you find any of the boggart minions that were with these goblins, kill them and search for more of these dwarf-picks. If the boggarts also carry the dwarf-picks, then surely something is amiss, and Dwalin will wish to know this disturbing news.'
Dwalin can be found in Frerin's Court, west of the Silver Deep. Boggarts line the way out of Edhelion.
Elladan has instructed you to take the dwarf-made picks to Dwalin and tell him of the goblins in the Silver Deep. He also suggested you slay some boggarts and learn if they, too, carry the picks.