Herbert darts around the table, pursued by his mother.
Answer:
In chapter 7, an eagle drops off Bilbo and Gandalf reestablishes his friendship with the Lord of the Eagles and the birds depart.
For who joins them im not <u>entirely</u> sure but in chapter 17 one of the messengers throws off his cloak and reveals himself as Gandalf. It could be that or the Lord of the Eagles.
sorry for the foggy answer, best of luck mate
This answer would be providing data or quoting.
Please tell if this is right or wrong.