Elrond was examining one of the swords that Gandalf and Thorin had taken from the trolls’ cave. "This is Orcrist, the Goblin-cleaver. A famous blade, forged by the High Elves of the West. My kin", he explained before delicately giving the sword back to Thorin. "May it serve you well", he says before taking Gandalf’s sword. "And this is Glamdring. The Foe-hammer, sword of the King of Gondolin. These swords were made for the Goblin wars of the First Age. How did you come by these?", he asked the wizard. "We found them in a troll hoard on the Great East road, shortly before we were ambushed by orcs" "And what were you doing on the Great East road?", the lord asked again. 

Later that night, Gandalf, Bilbo, Thorin, and Balin met in the Halls privately with Elrond. Thorin showed the lord the map to Erebor. "Erebor? What is your interest in this map?"