Vault 106's living quarters, downstairs in the left most room of the male dorms. It appears to have been written by one of the insane vault residents.
Oh man. I just had to get my thoughts on paper man, otherwise the cat in my head forgets, man. The sky is as blue as it used to be, I'm so happy to be here and my roomies are flailing around in the love mist. I can't remember what I was doing before but man is it great here now. I never thought about it like this before, but the walls just need somebody to love, too, man.
The writing style resembles a stereotypical "hippie" from the real-world 1960s.