Summary: After his fifth year, Harry's summer is downright depressing, but when Remus lets him sort through Sirius's things he makes a discovery that could change his whole life.

Millie: Glad you like it. As long as I get reviews I will continue to write, don't you worry.

Starryone21: I might do another story like The Lost Son, but I need to finish that one and the other running stories first. The ones I can finish anyway. However, working on more than one fic at a time isn't easy, so once I've worked passed my writers block, I'll focus on one fic only. Starting with this one.

Angelkitty77: Well, it means this: (read and find out) :D

Orlin: I promise to update as soon as I can with every chapter, but next week are my final tests at school and then I've finished it for the year, so I do have to study too. :(

Soft N' fluffy: Don't let those questions take over your brain, you might not be able to read the rest of the story. :P The girls middle name is Lily, because… Oh, just read, I'm not going to tell you, it would spoil everything. It's all in this chapter. Yet, there's one thing I can tell you, yes, Sirius loved this girl more than his own life.

Dark Secrets

Chapter 3: Letters

Suddenly, as if hit by lighting, Harry shot up and started working through Sirius's stuff, trying to find something, anything, that could hint him about this girl.

After an hour he still hadn't found anything and the small ray of hope the locket had given him died out. It was too good to be true to even believe a week old baby could have survived, but he had, hadn't he? He was only fourteen months older.

Then a picture sprang into his mind, a picture from the album Hagrid had given him, a picture of his first birthday party. If Elisabeth was really fourteen months younger than him, his mother should have been six months along, should have been showing. But the Lily in the picture didn't show any signs of pregnancy at all.

Mentally slapping himself for even thinking he could have siblings. He let himself fall back down on Sirius's bed. Locket still firmly kept in his fist. He let the locket dangle on its chain in front of his eyes. It couldn't be true, but still, he had a nagging feeling he was missing something.

Letting his free hand slide under the pillow, he suddenly stiffened again. There was something there. Again he shot up, this time pulling the pillow from its place.

His eyes fell on an envelope. With shaking hands he reached out and picked the envelope up. Just one word was written on the outside in the same handwriting as on the back of the locket: Sirius.

Holding his breath, Harry opened the envelope and pulled out a letter, steeling himself for anything that might be in there, before starting to read.

Hey Sirius,

Guess what! On the other hand, don't guess, I'll just tell you: Lily went into labour only a few hours after the incantation was put into effect.

I know what your thinking, it's two months too early. I'll tell you it scared us both too, but our guardian angel must have been watching over us today, for we are now the proud parents of a small, but healthy baby girl. As you probably figured by now, her name is Elisabeth Lily Potter and she's the most beautiful baby girl I've ever seen. She looks exactly like Harry when he was born, remember? Only she's so much smaller. Just look at the picture I sent you, you'll get what I mean.

Harry stopped reading for a moment and looked inside the envelope again. He found a picture of a small baby, laying on a bed in a light pink dress. Her bright green eyes were open and the little bit of hair she had was jet-black and extremely messy. Her toothless mouth was wide open and she was squirming, like she was giggling at him.

Harry felt a smile creep onto his face. He couldn't help it, this baby was so cute. Shaking his head clear, he turned back to the letter.

Me and Lily talked about this for a while now, ever since we heard there was a spy in our midst and we both agreed. We don't our daughter's godfather to turn out to be a Death Eater. Once this is all over I'm sure the others will understand. We really wanted Remus to be her godfather, I swear, but we can't trust anyone now. Your reasons for suspecting Remus, they sound so convincing, but now I can still hardly believe it. He would be the last person, second to you I would suspect. Then again, why would Voldemort want a squib like Peter? And I know you; you'd never, ever turn to the dark side, not with the way you grew up.

So, I guess, what I want to ask is if you would be Elisabeth's godfather too. I mean, with Moony a suspected Death Eater and the fact Peter can't handle kids, you're the best choice.

Just think about it.

Yours truly,
Prongs

P.S.
Please don't tell anyone about Elisabeth yet. I don't want to think about what might happen if Voldemort found out.

Tears once again ran down Harry's face. Never before had he seen his father's handwriting, at least, not that he knew. Now he thought about it, the handwriting seemed to be the same as on the Marauders' Map.

People had been telling him how much his parents loved him, but nothing, no words, could have convinced him more than this letter. Why had Sirius never mentioned this? Did Remus know? Did Dumbledore even have a clue? Why had nobody ever told him his mother had been pregnant? Did they think the loss of a sibling would be too much for him?

Anger stared to rise inside of him. How could they have kept this from him? Didn't he have a right to know about his baby sister?

Suddenly a lose panel in the wall shot open. Curiosity taking over the anger, Harry got up from the bed and walked over to what was now a hole in the wall. Remembering his hiding place under his bed at the Dursleys', he looked inside, but saw nothing, it was too dark for that.

Looking around the room he saw a candle, but it was off. Softly cursing he realised there wasn't anything to light it with and if he would go downstairs to ask for someone to light it, they would surely want to come along to see if there was anything in the hole.

Deciding to take his chances, he took his wand out of his pocket.

"Lumos." He whispered, as if that way the Ministry wouldn't find out.

In the light of his wand, he saw something reflecting the light somewhere deep in the hole and he smiled, knowing he found what he was looking for.

"Nox." He whispered, desperately hoping the Ministry hadn't registered his light.

He stuck his hand in the hole and reached as far as he could, the tips of his fingers brushing against a carved, wooden object. Harry tried to reach even further, but it was no use, the thing was out of reach. Frustrated he looked at his wand again and grinned, happy he was a wizard.

"Accio." He muttered, a small wooden box shooting out of the hole and into his lap.

Smirking triumphantly, he put the panel back against the hole, making it look as if it had never been opened. Then he turned to the box. On the top was a flying phoenix made out of a ruby and lined with gold. The sides of the box were carved with ancient symbols, probably runes. He silently cursed himself for not taking Ancient Runes, but there was no changing that now. Maybe Hermione would lend him one of her books, but right now he was more interested in what was inside the box.

Slowly he opened the box and frowned when there was nothing but parchment inside. Still curious as to what it meant, he picked up the top piece and unfolded it.

He immediately realised it was another letter. The handwriting was neat and looked a lot like his father's, but it wasn't quite the same. 'Dear Si,', it started.

Dear Si? Harry raised his eyebrow. Who would write that? He quickly looked at the bottom of the parchment and his heart stopped.

Love,
Lisa

Lisa? Could that be short for Elisabeth? Was his sister still alive? If she was, then where was she? Had Sirius never mentioned her to anyone to keep to one of James's last requests?

Harry's head was spinning with questions, questions that would probably never be answered. Unless…

He quickly shot up, taking the box, envelope and locket with him to his room. He'd go back for the rest later. There was something he had to try first.

Once back on his room, he sat back down at his desk, shoving his potions essay aside. He took a new piece of parchment and started writing.

Elisabeth…

A/N: Hope you liked it. Please review, I'd love to hear what you think of my story.