'There is a party of Longbeard dwarves 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. Bring him the picks and tell him of the goblins. They will wish to know this disturbing news.'
Goblins were discovered in the Silver Deep mines and Elladan fought many of them. He is troubled by what you discovered when you searched the bodies: Dwarf-made pick-axes carried by each of the slain goblins.
Bring the pick-axes to Dwalin
Elladan has instructed you to take the dwarf-made picks to Dwalin and tell him of the goblins in the Silver Deep.
Dwalin can be found in Frerin's Court, west of the Silver Deep.
'Greetings, good Elf! What's this? Pick-axes from the Deep? I must say yo uare not the only one who has brought me such news. I think that the Dourhands are falling back to their old ways, but I cannot yet prove it.
'You may have heard the tales of Skorgrim, the leader of the Dourhands, and the fall of the Elf-refuge? You were there? Then you know more than I. Still, you may learn something yet.'