The news received by Gandalf was that the Gobin armies and Wargs were joinding forces or getting together.
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Gandalf said they were very close to Beorn's house, and even after he said that they entered his bee-pastures.
The news that Gandalf received that made him rejoin Bilbo was the fact that the armies of the Goblins and of the Wargs had gotten together.
He tracked the bear to the river. He could tell that Beorn was checking out the story of that he had been told.
In the 3rd Chapter of The Hobbit 'A Short Rest', Gandalf and Thorin show their swords to Elrond at Rivendell. He tells them they were made by the High Elves of the West. In Riddles in the Dark, Bilbo pulls out his sword and it glows in the dark. He thought it rather splendid to be wearing a sword that glowed the way Gandalf and Thorin's swords did. Bilbo's little sword, which he later gives the name 'Sting', is of the same design and has the same magic.
After escaping the Goblins initially during the first attack, he follows the Goblins and their captives to the Goblintown. When the Great Goblin was about to attack Thorin, Gandalf revealed himself, drawing his sword, Glamdring, white emitted burning, white sparks that burned into the Goblins around him. He slew the Great Goblin and led the Dwarves out of the tunnels in the confusion, Bilbo accidentally getting lost along the way out.
At the unexpected party, Gandalf gives Thorin a map of the Lonely Mountain, which has information about a secret door and the key to the secret door.
Gandalf knows that Gollum is not entirely evil. There is still the good "Smeagol" side to him. Even though he is very wise Gandalf cannot see the ultimate fate of the Ring, but he senses that Gollum will have some part to play for good or evil, so, like he says, "the pity of Bilbo [and himself] may rule the fate of many." Also, Gandalf is not the type of person who will kill recklessly. And he himself, good and powerful though he is, has been tempted by the Ring's power, so he can vaguely understand Gollum's misery. Gandalf is very much like Jesus, who was tempted by Satan and can understand, though not agree with, a human's lust for power and easily corruptible heart.
He was so busy cleaning up after the party and breakfast that he never got around to his normal dusting.Bilbo had been too busy cleaning up. The dwarves had made their own breakfast and left all the dirty dishes. If he had followed his normal routine, he would have dusted the mantle much earlier in the morning.