Crumbled note

 is a paper note in Fallout 3. It can be found in the Brass Lantern in Megaton and allows you to access the terminal in that location. The note is jammed in a corner of the terminal room, behind a chair. However, the chair and wall overlap the note, making it almost unreachable. The most easy way is to stand on the chair, crouch and then slowly turn your head towards the terminal.