Didymus looked up, slowly, with wide eyes. That was ... that was normal when Dementors were around? He had never felt more relieved in his life, and he inhaled an unsteady breath, only to release it in a rush. If those things could make Sir Harry faint, then their powers must be insidious indeed.
"I thank thee, Sir Harry," he said, before shaking his head once more. "Verily -- thy words hath unburdened mine heart to a great degree."