Dear Scootaloo,
Hopefully now that you have received the sled, you will have realized that the previous four letters were not written in jest. This is as real as it gets. I timed everything perfectly. The leyline alignment. The astronomical coordination with the Eponal Belt. Even the precise time when you receive this. On the evening of the 19th, a blizzard will roll through central Equestria, blanketing Ponyville with an early layer of snow. If you have any prevailing doubts, I hope that this latest detail—if nothing else—will convince you of the truth.
The best time to perform the first experiment is this coming Monday, November 20th, around midday. Don't worry, you won't be called to school then. Trust me. Besides, you have all the time in the world now. I only ask for one thing and one thing alone.
Scootaloo, my lovable little scamp, you absolutely must come to these coordinates: December 11th in the year 3882 of the Equestrian Era. Location: 1983 Heave End on the east side of Downtown Fillydelphia at precisely 6:31pm. There, you will find a duplex situated besides a giant oak tree. Walk up to the door on the left—with the pegasus-shaped door knocker—and knock three times. I promise you, I will answer. And when I do, I must ask in this letter that you give me back the pendant that I sent you two weeks ago in the second parcel. By the time you give it to me, it must be free of the gold bands that currently encase it. This will all make sense to you at the time, I promise. In the meanwhile, you may go and do anything else with the sled as you wish—provided that you exercise extreme caution. But you absolutely must arrive at these coordinates at some point or another. For safety's sake, please follow my previous instructions to the letter, and you won't regret it.
I know that I am asking a lot of you, but this is the only way we must proceed with the experiment. Believe me when I tell you that—while I am requesting much—I also intend to give you so, so much more. I know that you have always felt... constrained by the circumstances of your life, Scootaloo. It is my sincere hope that both you and I will now find new freedom... new liberation in the time to come... a time that is boundless.
And please believe me when I say that you have always been and shall continue to be my most favorite niece, a source of inspiration in more ways than you can possibly fathom. I look forward to when we meet again. And we will meet again. It is written in the stars... just like the blueprint for the sled was.
With love and devotion,
-Aunt Wellspring