Gandalf meets with Bilbo in the opening of "The Hobbit". He arranges for a tea party, to which he also invites the thirteen dwarves and thus arranges the traveling group central to the novel's narrative. Gandalf contributes the map and key to Erebor to assist the quest. On this quest Gandalf finds his sword, "Glamdring", in a troll's treasure hoard. Elrond informs them this sword was made in Gondolin, a city where Elrond's father lived as a child before its destruction.