As Harry walked to lunch one day, he was ambushed by a pair of redheaded twins. Each took a side and placed their arms over his shoulders, effectively pinning him in.

"Ickle Harry."

"Not so ickle anymore."

"We hear you're to blame for our detention."

"Clever, very clever."

"Blaming the original school pranksters."

"Just thought we'd let you know."

"You've officially declared war."

Harry grinned at the twins.

"You're talking to the son of two Marauders. Bring it on." He smirked. Fred and George both frowned, and exchanged a glance.

"The Marauders?" They asked simultaneously. Harry nodded.

"My father and my dad were two of a gang of four, and self-styled themselves as the Marauders, back in the '70s."

"Who's your dad?" One of them asked. Harry raised his eyebrows. Who didn't know?

"Well, my father is James Potter, and my dad is Sirius Black… They even had nicknames; Prongs and Padfoot." When he'd grown old enough to wonder why most people had a mum and a dad, not two dads, Dad and Papa had explained themselves, and a little bit about the scandal that had followed. Everybody knew, or so he thought.

Fred and George had a conversation that mostly involved wriggling their eyebrows. They withdrew, and one of them rustled through his bag.

"Harry my lad."

"In deference to your ancestors."

"And in thanks for saving Ronikin's skinny little arse."

"We're willing to give you a present of sorts."

"Never fear."

"We're still at war."

"But it's your birth right, one might say." They handed him a piece of parchment. He stared at it, then at them, waiting for the explanation.

"That there is the secret to our success."

"It's a wrench to give it to you, believe me."

"But frankly it belongs to you."

"George, if you'll do the honours."

"I solemnly swear I am up to no good." George murmured. The words unfurled on the parchment.

"Messrs Moony, Wormtail, Padfoot and Prongs are proud to present the Marauder's Map." He whispered. He leaned against the wall for support, blinking away the stinging in his eyes.

"My father's map." He had very little that belonged to his father, most of it destroyed, or in evidence. Fred cleared his throat, and shifted uncomfortably.

"We owe them so much."

"Stole it from Filch's office, first year."

"Thank you guys. I really appreciate this." He said, unable to tear his eyes away.

"To clear it, tap it and say 'mischief managed'." George said, tapping the map with his wand. He smiled at them and they grinned back.

"I can tell you some stories that Padfoot told me." Their eyes lit up. He paused for a moment, contemplating.

"In fact, why don't you come meet him?"

"It would be an honour." They said, very seriously.

"He's in Papa's quarters right now." Harry said, eyeing the map.

"Oh no, the dungeons!" They joked.

Harry led the way into his parent's rooms.

"Harry! And you've brought friends? Hello Weasley twins one and two." Dad greeted them happily.

"Fred, George, may I introduce Padfoot, an original Marauder." Dad raised an eyebrow.

"You're our inspiration." They both said.

"They had the map!" Harry thrust the parchment into his hands. Dad grinned.

"No way! I thought we'd lost this forever. I solemnly swear I am up to no good." The lettering appeared.

"Ah, the good old days." He eyed the twins.

"Weren't you two behind the beards last week?" Harry stared at his shoes as the twins sniggered.

"I think you need to look a little closer to home." George said. Harry glanced up to see Dad frown. Then his eyes widened.

"Harry! Severus was steaming mad! Good job old chap." He ruffled Harry's hair.

"How did you do it?" Harry smirked.

"Charmed the house elves into letting me add a potion to the pumpkin juice."

"No way."

"The little sods."

"They never let us get away with anything." Harry shrugged, grinning smugly.

"They love me."

"Evidently so. Dumbledore asked them if they'd seen anyone do it." Dad said.

"Well, they turned their backs, so they didn't see me do it." Harry said, and Dad chuckled.

"Well done. Now, you just here for a social call?"

"Do you mind if we have lunch together? The twins would like to hear some stories." Dad inspected both the twins, then gestured for the lot of them to sit down.

"I'll ask the house elves to bring us some sandwiches. Now Harry… did I ever tell you about the Great Toilet Blockage of '76?"