"I'll fix it up with Mum and Dad, then I'll call you. I know how to use a fellytone now - " "A telephone, Ron," said Hermione. "Honestly, you should take Muggle Studies next year."

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As for the fact that Malfoy, Crabbe, and Goyle apeared to be going their different ways when they were usually inseparable, these things happened as people got older--Ron and Hermione, Harry reflected sadly, were living proof.

— J. K. Rowling