It seemed that Bilbo was not going to be eaten after all. The wizard and the eagle-lord appeared to know one another slightly, and even to be on friendly terms. As a matter of fact Gandalf, who had often been in the mountains, had once rendered a service to the eagles and healed their lord from an arrow-wound. So you see 'prisoners’ had meant 'prisoners rescued from the goblins’ only, and not captives of the eagles. As Bilbo listened to the talk of Gandalf he realized that at last they were going to escape really and truly from the dreadful mountains. He was discussing plans with the Great Eagle for carrying the dwarves and himself and Bilbo far away and setting them down well on their journey across the plains below.