Hermione was so troubled by Ron that she couldn't concentrate. The lessons had become difficult for the first time, and her once infallible brain was distracted and no longer able to assimilate information, and even the slow murmur of Professor Binns was of no help. She could hear him talking about Grindelwald, but the only words she could comprehend were Dumbledore's name repeated several times. Her parchment, usually filled with notes, remained untouched.