From Old Olney, travel east to the Red Rocket under the highway overpass; the one with the jack-knifed Nuka-Cola truck carrying the Quantum shipment. Take the road north past the three-way intersection. After passing the billboard, begin looking east. The corpse is between the standing and knocked over trees.
Alternatively, head northwest from Chaste Acres Dairy Farm to the Red Rocket. Once there, take the road north and then turn and take the first turn east. Follow the road until hitting a building with a blue car. Go to the car, and from there, face west at a tree. Go to that tree, go past it and keep heading west to another tree. The wastelander should be found dead under that tree and the other broken tree next to it.
Hello, my sweet sister.
I know it's been a long time since I've written, and for that I sincerely apologize.
It's been three years since I left home to make my mark on the world. I've been places, Grace. I've seen things your eyes could scarce imagine.
But my odyssey is now complete. I'm ready to return home, and will begin the journey in just a few days.
Here's hoping we can pick up right where we left off. You're the only person I have left in this world, Grace. I love you, and I want us to be a family again.
Behind the scenes
This is a reference to Homer's Odyssey in which the main character goes on a long trek after the Trojan War.