The Changed Timeline
by Teddylonglong
All recognizable characters belong to J. K. Rowling, and I am not earning anything by writing this story.
I am not a native speaker of English. Please excuse my mistakes.
COMPLETELY AU! Partly OOC! Time travel!
As soon as the carriages with the other students had left Hogwarts, the six Marauders gathered in the boys' dormitory and made plans in order to efficiently use their holiday time. They paired up in three groups, Harry and Severus, Remus and Sirius, and Lily and James, and divided the castle into three large parts for their initial explorations. For the second week, they were planning to go all together to suss out parts of the castle that were difficult to access and where their different special abilities would be needed.
The six friends spent the whole time exploring the castle. Unfortunately, Harry and Severus were so absorbed in their task that they managed to miss lunch or dinner every second day, but the two boys could not care less; as long as they weren't hungry, they did not want to interrupt their work. Five minutes before curfew every evening, they flashed to the hospital wing, where Harry downed his obligatory nutrient potion, before he transformed back into his phoenix form and flashed Severus and himself back to Gryffindor. On the fifth day, McGonagall and Pomfrey were waiting for him, looking very angry and threatening to keep him there if he missed another meal, causing Harry to be more careful about the mealtimes during the second week.
At the end of the first week, the friends were able to draw the main points onto the map and only had the fine-tuning left for the second week as well as the Charms that they wanted to apply to the map. During the second week, Lily and Remus spent a lot of time in the library looking for useful Charms for the map, while the four others were busy with the fine measurement of places that were difficult to access, where Harry's or Severus' Animagus abilities were needed. Due to Harry's ability to flash them all around the castle, they managed to complete most of the areas by the end of the holidays.
Too soon for their likings, school started again, and each of them regretted not having much free time anymore. Only whenever at least two of them had free periods, they continued to work on the map.
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Quidditch practice resumed as well, and James made them train very hard in order to win the Quidditch cup that Gryffindor apparently had not won in ages. The final match against Ravenclaw was in two weeks' time, and they had Quidditch practice not only three nights a week until a few minutes before curfew, but also on Saturday and Sunday mornings. Harry groaned in annoyance; he loved flying, but Quidditch practice five days a week, especially mostly in the rain, was just too much for his liking.
HP
One day, Severus asked Harry about the Chamber of Secrets. "We should go and visit Amaterasu and have a look at Salazar's rooms," he suggested. "Don't you think so? Maybe we could go down there on Saturday or Sunday?"
"I have Quidditch practice in the morning, but after that we can go, on both days if you wish. Perhaps Granddad or the Marauders would like to join us as well," Harry replied, and they decided to ask the headmaster first.
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After nearly four hours of Quidditch practice in the rain and a short lunch on Saturday, Harry, Severus and the headmaster entered the Chamber of Secrets.
While Severus spoke with Amaterasu, receiving a few potions ingredients from the basilisk, Harry and Professor Dumbledore followed Amaterasu's advice to further explore the Chamber only to discover that it was much larger than they had originally thought. After passing through one small wooden door that they had discovered, which also opened on "open" in Parseltongue, they found a comfortable room similar to the Gryffindor common room, only in Slytherin colours. The room even held a large fireplace, and behind another door they found a huge library, which contained large ornate book shelves that reached the ceiling and were packed full of books from the Founders' time. The room was a treasure trove for long lost research.
"I'm already so busy, when will I have the time to read all these books? Where's Hermione when I need her? Maybe I should stay here until the end of my seventh year, Great granddad," Harry blurted out, jokingly.
"Why not Harry, you're very welcome to do so. It doesn't matter when you return as long as you do so before you're born. You already changed the future so much that it doesn't matter anymore," Dumbledore reassured him gently, popping a lemon drop into his mouth as he spoke.
While Harry was sitting on the sofa in Slytherin's chamber looking at a book, the conversation with his grandfather replayed repeatedly in his mind.
Suddenly, Dumbledore's voice brought him back to the present. "Harry, dinner will begin in ten minutes; we need to return, but we can come back here tomorrow if you want."
They hurriedly called Severus, and Harry flashed them to the Potions classroom, where Severus stored all the ingredients that he had collected, before Harry flashed them to the Great Hall just on time for dinner.
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"Hi Harry, where have you been?" Sirius queried, letting out a few sneezes.
Remus cast James a dirty look. "That's what you get for having your team fly in the rain for hours; they get sick and you have to play Quidditch all on your own."
"Tell him Remus. He is crazy," Harry agreed, before he explained in a small voice, "I went to the Chamber of Secrets with Dumbledore and Severus, because he wanted to ask the basilisk for some potions ingredients. My great grandfather and I explored a bit, and we discovered a huge library, containing hundreds of books from the time of the Founders."
"Really Harry? That sounds very interesting. May I come with you sometime?" Lily enquired, excitedly.
"I'd love to go as well," Remus spoke up.
"Me too," James and Sirius agreed, simultaneously.
Harry let out a long sigh. "I can take you all, but can we please wait until after the Quidditch match? Dumbledore, Severus and I will go again tomorrow. I could take one of you with us but not everyone. Lily, do you want to come tomorrow?"
"Yes Harry, I'd love to go with you tomorrow, thank you," Lily said happily, looking at her future son in excitement.
After dinner, Lily and Harry met with Severus in the Potions classroom. "Very well, what do you want to brew today?" Severus queried.
"I'd like to brew some healing potions," Harry replied, "maybe Pepperup potion?"
"Why, are you ill?" Lily asked, eyeing him worriedly.
"No, at least not yet, but if James continues with these Quidditch practices and I have to fly in the rain for another three or four hours a day it's only a matter of time. Sirius has already caught a cold," Harry replied, sighing in apparent annoyance.
"All right, we can do that," Severus agreed, pensively. "But you have to promise to be careful with the potions. If you take them too often or in a too high dosage, healing potions can be dangerous. And if you drink any of them, you must tell someone," he added in a stern voice.
"Okay, I'll remember to do that," Harry replied evenly. They brewed the healing potion, which Harry had suggested, and Severus took half of the batch to give it to Madam Pomfrey, before he handed the other half to Harry.
"Thank you Severus. By the way, do you think we should include the Chamber of Secrets in the Marauders' Map?" Harry suddenly remembered to ask.
"Why not? On the other hand, nobody can access it, or is there another way rather than the normal entrance?" Severus queried, quirking an eyebrow.
"I don't know," Harry admitted. "In the room that I visited with my great grandfather today, there was a large fireplace, so maybe we could connect it to the internal Floo Network. I can ask Dumbledore tomorrow."
"All right you two, curfew begins in twenty minutes, so we should head back," Lily spoke up, clearing their workspace with a flick of her wand like she had been taught by Severus a few weeks ago.
"All right Severus, we'll see you after lunch tomorrow; Lily's going to join us tomorrow, and the other Marauders are already on the waiting list," Harry explained with a smirk.
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On Sunday morning, the everlasting rain continued, but James insisted that the weather on the following Saturday would probably not be much better and they needed to train in this weather in order to be prepared for every occasion, and Harry in particular should practise finding the Snitch between the low-lying clouds.
'What a nonsense,' Harry thought, as he searched for the Snitch in absolute annoyance. 'It won't help me find the Snitch faster next week, since the clouds will be different from today's, and it's not as if the Snitch had a pattern in which kind of clouds it hides.' He sighed in relief, when James ended the practice on time for lunch.
HP
Right after lunch, Dumbledore and Harry led Lily and Severus to Salazar Slytherin's library.
"Professor, do you think this fireplace could be connected to the internal Floo Network?" Harry asked as they crossed the room with the fireplace.
"I've no idea, but we can try," Dumbledore said, pensively. The headmaster lit a fire in the fireplace, conjured some Floo powder, threw it in, and the fireplace turned green. Sticking his head into the fireplace, he shouted, "Minerva McGonagall's office."
During the next few minutes, the two professors discussed how to discover the name of the fireplace they were just using; however, they were unable to come up with a solution.
"Is there a portrait of Salazar Slytherin somewhere in the castle? We could ask him; he should be able to help us, considering that he built this part of the castle," Harry suggested.
"That's a very good idea, Harry; I believe that there is a portrait in the dungeons. I'll look for it," Dumbledore promised in determination.
"Perhaps we can even find out some information about it in the library," Severus spoke up.
"Let's have a thorough look around the library," Dumbledore agreed, and each of the three began to skim a different corner of the extensive library.
"Professor, should we perhaps catalogue all the book titles on a parchment?" Lily queried, giving the headmaster a questioning glance.
"I believe that would be a very good idea," Dumbledore agreed immediately. "Let me call Minerva again and ask her for parchment and quills so we can begin." He came back with the required materials, and the four set to work.
Nevertheless, by dinnertime, they had only finished a very small part of the library. "Maybe we should try to come again in the evenings after dinner; otherwise we'll never finish this," Harry suggested, looking questioningly at Severus, Lily and his great grandfather.
"We can come back later today, right after dinner," Lily agreed, glancing around in excitement.
"I'm afraid I won't be able to come with you," Dumbledore replied, thoughtfully, "but I'd like to ask you to bring Floo powder in order to call me in my office in case you need help, and please keep the entrance open to allow any of us to come to help if necessary. I know that Fawkes could flash me here, but I just want to be on the safe side."
"All right, Professor, we'll do that. Maybe we can bring the other Mar… Ah … I mean James, Sirius, and Remus as well, and they can help us with the cataloguing of the books," Lily said, looking questioningly at Harry, who nodded in confirmation.
"All right then, let's go," he replied and transformed into Icicle. With a flash, they left for the main part of the castle."
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After dinner, Harry, Severus and Lily brought their friends with them to the Chamber and continued copying the book titles.
"What's this?" James suddenly queried, holding up a book.
Harry looked at the title, unable to understand what James' problem was, before he realized that it was written in Parselscript. "Oh Merlin, do you know what this is?" he shouted in excitement. "This is Salazar Slytherin's diary!"
"Wow, that sounds cool. But since you're the only one able to read it, maybe you should translate it for everyone to read," Sirius suggested.
"You're right Sirius; I'm going to take it with me and try to translate it," Harry promised.
The Marauders spent the rest of the evening cataloguing books, before they decided finish for the day.
"I'm going to take this diary with me and hope I can find time to read and if possible translate it. Does anyone else want to borrow a book?" Harry asked before changing into Icicle again.
Lily and Remus each borrowed a book, and they returned to their common rooms.
HP
During the following week, the six friends spent every evening, on which they did not have Quidditch practice, in the chamber. The library was so huge that by Friday evening they still had not finished cataloguing the book titles.
Harry began to read Slytherin's diary. However, he was so busy with classes, homework, Quidditch, cataloguing book titles, and exploring for the Marauders' Map that he could only read during the night. Moreover, even if the book was very interesting, due to the fact that it was written in Parselscript, Harry could not read it as fast as normal English books.
tbc...
Thank you so much for your kind reviews!