Rumpelstiltskin's Cottage
The line for Rumpelstiltskin's Cottage is surprisingly long. It's going to take some effort just to reach the entrance.
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When you get there, look around for a piece of paper taped to a wall.
(Reminder: You're, of course, wearing your badges during Mystery Hunt. If you're gathering data on campus at night, please be extra-sure you have your badges.)
Solving that puzzle led to a location on MIT campus. You can see photos of the location. There, teams found this sign.
Solving that led to another location, pictured here. There, teams found this paper.
Solving that solved the puzzle.