March 28, 1999 - I found a chemical reaction of 5 elements can make an object disappear and reappear in 2 weeks. Adjusting the order of the elements & using different voltages can control the time and size of object to be transported to (see the full theory & diagram in the notebook)

August 5, 2002 - I met Natalia on the way to the train station. She was talking on the phone when she dropped her wallet. I picked it up and returned to her. That's how we started to know each other.

December 25, 2012 - I completed 50 testing on the time machine - some example: I time transported a piece of bread with butter, to two weeks back - when the time transportation is completed: what I saw was the bread was at the same place, but full of fungus.

I then time transported a can of Coke to three weeks in a future - the object disappeared. But three weeks later, the Coke reappeared with the drink still fizzing.

January 13, 2013 - It is our 10 years anniversary. Natalia made a birthday wish to go back to 13 August 2001, to stop a car accident that caused a scar on her face.

Knowing that action might change the timeline, I time-traveled to:
October 12, 2000 - to sign up the safekeeping service that was valid for 1 year, with 1 month notice for collection before expiry. That was when I posted these letters & notebook to you both

After reading these chronologies, if my theories earlier were correct, that means you are already in different timeline now.

Just my thought, sometimes, when a history is done for, there is no point to reverse. Just live with it, and find ways to move forward.

It seems my only legacy is these letters.

For I exist in a timeline that no longer exists.

The second page of the letter reads

"In year 2013, Natalia and I have been together for 10 years.

On the anniversary, she wanted a gift, that is to use the time machine to time travel, to avoid a car accident that caused a scar on her face.

I predicted that will change the timeline from there onwards. In case you both only know each other by now, that means history for my timeline had changed.

Predicting that might happened, I wrote these two letters, signed up with a safekeeping services so that it will send the collection reminder to both of you, with two purposes:

1) to safeguard my invention: time machine
2) to inform you that Natalia is the greatest person to be with.

Apart from that, I can also get to confirm two theories (I guess you will be the one confirming that, if the timeline has changed):

1) Changing a past event can affect the timeline from that point of time onwards.

2) if that is the case, whoever makes the changes will disappear from the timeline, because that person is no longer relevant.

Sounds complicated? I'll write a chronology of the timeline that happened during my time, to let you understand better"

13 Sep 2001

It's almost evening.

Natalia followed the address to the house. She arrived at a house that has a huge garage beside it.

She knocked the door for a while, having no one answering the door.

Instead, someone came out from the garage to answer the visitor.

As the person approached Natalia, she realized that he is the guy whom she saw in the shopping mall last month, and who has been appearing in her memory randomly.

She was shocked and starting running away.

The guy chased after her, while asking out loud "Are you Natalia? I am Timothy!"

"But I didn't write those letter!"

Natalia slowed down, she asked "What did you just say?"

Timothy replied "Well, I retrieved a letter from a safety box, sent by a guy named Timothy, he asked me to anticipate a girl named Natalia to visit you."

Taking out a letter from his jacket, he continued: "Listen, if you can just read the letter that I had received, I believe that we can solve the puzzle - in the past one month, I had a strange memory of a lady appearing  in my mind, and yes, that lady does look like you."

Natalia started reading the letter

"Dear Timothy,

What you are gonna read is something that will blow you mind.

Yes, it was me writing to you from the future.

In year 2013, I had successfully built a time machine. I was able to do time traveling and had fun!

Something happened in the future, just right after I built the time machine - which I will further explain in the next page.

Now, right after you retrieved this letter, expect a lady who's gonna visit you - her name is Natalia.

Show her this letter, and next, show her the time machine you were building - before she can really trust what you are saying"

"So, do you wanna see the beast that I'm building? I've started it like 3 years ago, but myself from future had sent the working blueprint that will really help me to complete this thing!" Timothy said.

"Wait! I'm still very confused - how did that Timothy send us all these letter, and what time machine are you talking about?"

"Perhaps you need to read the next page of the letter" Timothy said.

12 Sep 2001

Just a day after the shocking encounter at the mall, it was Natalia's birthday.

It was a usual day in the office, added with a bit of surprise by the colleagues, in conjunction to celebrate her full recovery from the accident last month.

When she arrived home, her sister was preparing dinner, while telling her "Hey you've got a mail"

Natalia picked up the mail from the coffee table, it was sent by a bank's safekeeping services, indicated that she has an item due for collection.

That made her feel strange, as she had never signed up any safekeeping services.

But out of curiosity, Natalia took a day off next day to collect the item.

13 Sep 2001

At the bank, she opened up the safety box, inside, it was another letter.

The letter read:

Dear Natalia,

First of all, Happy belated birthday.

I hope you have been well.

Anyway, if you see this letter, please proceed to take this letter to the home address written at the back of the letter.

A greater revelation lies ahead.

Regards,
Timothy

Despite feeling weird on those uncertainties, Natalia had decided to pay a visit to the address - since she had nothing to do for the rest of the day.

September 11, 2001
Almost one month past, the car-hospital incident was left behind Natalia's head.

She was in the office when her colleague talked to her in shocked mode "There's something really horrible happened in the New York City. I heard it was terrorist attack"

Natalia replied without hesitation "Yes it was really bad - the terrorists hijacked the plane and collided onto World Trade Center"

Her colleague asked "How did you know?"

Natalia paused, she was unsure. Yes, how would she know as she has been working non stop since early morning? She was so busy that she didn't even have a chance to listen to radio, and of course, no time for web surfing.

The headache came back again - she took the day off and went to shopping mall to get something from the pharmacy.

While she was walking in the shopping mall, towards a junction, she was as if having a flashback - she had seen this before, it was as if she dreamed about this exactly same scenario, same atmosphere, and if she turns right at the junction, she would meet a guy in green shirt, whom she would start talking with.

Natalia slowed down her pace. She slowly walked towards the junction, had a peek at the right corner.

To her surprise, she saw a man in green shirt, who looked exactly the same in her flashback or dream.
The guy noticed that Natalia was staring at her, and he stared at Natalia with clueless face, too.

Out of shock, she ran away from the shopping mall, headed home.

At home, she was still very confused. The guy looked so familiar, but where else did she meet with him? Do they know each other? If they know each other, why would the guy gave her the clueless look?

She frantically took out her yearbook, flipped thru the pages. No, the guy was not in any of the classes.

She closed her eyes, trying to recall who the guy was.

In her fragmented memory, she 'saw' that the guy used to hold her hand, intimately.

Natalia opened her eyes, she was even confused and what's more, she is now scared of what she had just recalled.

Just exactly who is he? What was in her mind? Where did those dream or familiar feeling come from?

August 13, 2001
Natalia woke up in a hospital, she didn't know how what happened.

All she could remember, was that she was as if flying thru a starry night sky, and now, woke up with occasion headache.

A nurse approached her when she noticed that she had awaken.

"How did I end up in here?" asked Natalie
"You were about to cross the road while a fast approaching car almost hit you - but just before it happened, it seemed you were pulled back by a strong force, then you collapsed right after that" the nurse replied.

"The doctor said your situation is quite stable & without any big issue, you can be discharged by tomorrow" the nurse added.

So, Natalia tried to look at her body - true, there were no bruises all over her body.

She went to bathroom to wash her face. In the mirror, she somehow thought there was a scar on her face - but it is not there anymore.

Natalia tried to call her sister - her only contactable relative in this world - but another person picked up the phone.

She had headache again, while trying to recall the actual number, she succeeded with her sister came to accompany her till the night.

The next day, she left the hospital to have the rest of the day sleeping at home.