Baranglim of Lórien, a perceptive scout, has theories about the movements and activities of the Orcs in the Halls of Crafting. He believes that war is brewing and that the Orcs are producing a great store of armour, weapons, and vile draughts within Moria.
'My friend Baranglim has watchful eyes and a wise heart. He has seen much, and I know that Celeborn has taken counsel with him recently regarding the Enemy's activity on the borders of Lórien. Baranglim has gone to Moria to see what can be seen.
'Rumour has reached us of a great rousing of a war-force out of Moria. The Orcs have taken the Halls of Crafting, and use the forges of the dwarves to brew war. You should seek Baranglim in Moria, and aid him. I know he made for the Flaming Deeps.'
Baranglim can be found in the Flaming Deeps of Moria, near the Halls of Crafting.
You should go to Baranglim and speak with him about what must be done to weaken the Orc-forces rallying to assault Lothlórien.
The Halls of Crafting is in the southern reaches of the Flaming Deeps of Moria, near Fil Gashan.
Baranglim has given you an Elf-stone to place in the Halls of Crafting. If you drive out the enemies and place the stone there, the Orcs will fear to return again.
Haldir is upon his talan on the banks of the Nimrodel, in Lothlórien.
You should speak with Haldir and tell him all that you saw and achieved in the Halls of Crafting.