what did the travelers learn about the swords? from the hobbit chapter 3

Elrond identified the swords Gandalf and Thorin had taken from the trolls’ cave as being very old swords made by the High Elves of the West, his kin, for the Goblinwars. Thorin’s sword was named Orcrist, the Goblin-cleaver. Gandalf’s was named Glamdring, the Foe-hammer, and was once worn by the King of Gondolin. 2) Elrond read the moon-letters to reveal the way to open the secret door on the side of the mountain.