Charles was finding it very difficult to concentrate this afternoon, for reasons he hadn't worked out yet. After lunch, he'd gone back to the common room to work on Transfiguration, but there had been too many people about. He'd come down to this empty classroom to do his work, but so far he wasn't having any more luck than he had before. He was meant to be working on vanishing, but the only thing vanishing at the moment was his patience. The quill he'd picked out of his bag to practice on was still stubbornly sitting on the desk, mocking him.

When the door opened, it was almost a relief to have a distraction, but still Charles sighed, saying without looking up, "Sorry, I'm already using this space."

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