Per 
You walk into your office. You're the Site Director of Site-30. You just got back from the cafeteria and you have a cup of coffee. You look out your window. It's a beautiful day. Then you realize there is a mop embedded in your desk. Upon closer inspection, there is a note attached to the mop with a staple. You read the note.
Dear Director,
So, by the time you're reading this I probably already walked out of the door after bribing the guard there with a 20 and a Snickers I found under the vending machine. But he doesn't know that so don't tell him. Just a funny little secret between you and me. But anyway, I'm going. Just gonna leave Site-30 and start doing pottery or growing weed or something else that old people do when they no longer have a purpose.
Don't get me wrong, it ain't your fault. You gave me a good closet to sleep in, nice buckets and warm mops to keep me from freezing in the night. (Seriously, turn on the furnace once in a while.) There's just one problem: it ain't fun anymore. Going around, stabbing monsters with brooms and sweeping up messes just doesn't get to me anymore. It used to be a riot. But now I just smell like mop water and steal from the cafeteria.
I had a blast working with you man. And hey, we're bros, right? I bought you drinks one time so we're bros. I want you to tell everyone else I had a blast working with them. Even the eggheads. And hey, no promises but I might come back if this whole wandering old man business doesn't work out. I'll probably wear a fake mustache or something so you guys won't tell. Anyway, tell the guys that they're super cool.
-Janitor Worth, Friend To Mops, Enemy To Dust
P.S. Check your filing cabinet. I left you some stuff to remember me.
You check the filing cabinet.
You find a picture of a lazy cat.
A rolled up piece of paper with some weed inside of it and the letters "AA" written on it.
A sticky note that won't stop screaming.
A picture that says "SCP-3908 is SCP-3908."
A 20-sided dice except all the numbers are replaced with "3" "7" and "4"
A picture of Dr. Everwood with a kiss mark on it.
A bucket that is filled with ideas.
