"She's -- she's sent me a Howler," said Ron faintly.[br]"You'd better open it, Ron," said Neville in a timid whisper. "It'll be worse if you don't. My gran sent me one once, and I ignored it and" -- he gulped -- "it was horrible."
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"The Leaky Song" by Brad Mehlenbacher of Draco and the Malfoys