what two pieces of useful information does beorn discover when he goes out night and turns himself into a bear? need text evidence

From the text:

"From the burnt wolfglade he had soon found out that part of their story was true; but he had found more than that: he had caught a Warg and a goblin wandering in the woods. From these he had got news: the goblin patrols were still hunting with Wargs for the dwarves, and they were fiercely angry because of the death of the Great Goblin, and also because of the burning of the chief wolf's nose and the death from the wizard's fire of many of his chief servants. So much they told him when he forced them, but he guessed there was more wickedness than this afoot, and that a great raid of the whole goblin army with their wolfallies into the lands shadowed by the mountains might soon be made to find the dwarves, or to take vengeance on the men and creatures that lived there, and who they thought must be sheltering them."