"Noble men, working tirelessly to help a new generation of lawbreakers," said Fred solemnly.

 "Right," said George briskly. "Don't forget to wipe it after you've used it or anyone can read it," Fred said warningly. 

"Just tap it again and say, 'Mischief managed!' And it'll go blank." 

"So, young Harry," said Fred, in an uncanny impersonation of Percy, "mind you behave yourself."

 "See you in Honeydukes," said George, winking. 

They left the room, both smirking in a satisfied sort of way. Harry stood there, gazing at the miraculous map. He watched the tiny ink Mrs. Norris turn left and pause to sniff at something on the floor. If Filch really didn't know... he wouldn't have to pass the dementors at all.... 

But even as he stood there, flooded with excitement, something Harry had once heard Mr. Weasley say came floating out of his memory.

 Never trust anything that can think for itself, if you can't see where it keeps its brain. 

This map was one of those dangerous magical objects Mr. Weasley had been warning against.... Aids for Magical Mischief Makers... but then, Harry reasoned, he only wanted to use it to get into Hogsmeade, it wasn't as though he wanted to steal anything or attack anyone... and Fred and George had been using it for years without anything horrible happening.... 

Harry traced the secret passage to Honeydukes with his finger. 

Then, quite suddenly, as though following orders, he rolled up the map, stuffed it inside his robes, and hurried to the door of the classroom. He opened it a couple of inches. There was no one outside. Very carefully, he edged out of the room and behind the statue of the