Shelley's letter is a paper note in Fallout 76.
Location
The note can be found at Camp Venture, on the counter of the building at the weapons training range.
Transcript
Brant,
Remember how crazy you said I was to join up with the Brotherhood of Steel at Camp Venture? How you said I wouldn't be able to hack it, that I'd quit within a week? Well I'm writing to tell you that you were dead wrong. This is where I belong, side-by-side with people who give a crap about this world. Senior Knight Wilson treats me like I'm important, like I matter. Something you never did. I've found my calling, and I'm not coming home. The Brotherhood is my new family now. Now who's laughing?
Shelley
