She threw a sharp, sideways glance at Dumbledore here, as though hoping he was going to tell her something, but he didn't, so she went on. "A fine thing it would be if, on the very day You-Know-Who seems to have disappeared at last, the Muggles found out about us all. I suppose he really has gone, Dumbledore?" "It certainly seems so," said Dumbledore. "We have much to be thankful for. Would you care for a lemon drop?" (Harry Potter and the Sorcerer's Stone)
Is much implying ‘a great thing’ and indicating the previous ‘he really has gone’?