Micscheif Managed!
"What d'you reckon it does?" Fred whispered for the millionth time.
"No clue," answered George, staring at the blank parchment.
"Because, I mean, Filch wouldn't've confiscated it if it didn't do something," said Fred. He seized the parchment. "Just tell us what you do!"
"I don't think yelling at it's going to work," George began, but words appeared.
Mr. Moony would like to suggest using your wands.
Mr. Padfoot would like to say that this parchment will help you cause mischeif.
Mr. Prongs would like to suggest an incantation.
Mr. Wormtail would like to suggest to try harder.
"Well, it's not a blank piece of parchment," said George, astounded.
Fred thought. "An incantation… well, I'll think of something. You do the wand thing."
George pulled out his wand and started tapping the parchment when Angelina Johnson approached their table in the common room. "Whatcha doing?" she asked, before noticing the parchment. "Whoa… are you guys going to finally start on that Potions essay?"
"Us? Homework?" asked Fred, offended. Raising his right hand, he told her in a mocking-sort of voice, "I solumnly swear that I am up to no good."
An audible gasp came from George behind him. "Fred, look," he whispered.
"Oh my wizard god," said Fred, amazed, looking at the map.
"What is it?" asked Angelina, trying to get a peek at the map.
"Nothing," said Fred and George together, flipping the map over.
"Just go away, Angie," said Fred.
With an angry sigh, Angelina went up to the dormitory.
Now alone, Fred and George did a happy dance. They had finally solved the mystery of the parchment.