See also: Puzzles
There is a lever and five devices. You must initialize the devices in the correct sequence. Number the devices (1 - 5) as you look at them facing west from left to right and then activate them in the following order:
After initializing all five run to and click the lever in the middle to make a chest appear in the ground in front of it. You have EXACTLY enough time to do this with nothing to spare so do not pause. Click on the chest to receive A Large Key. Click on the chest again to use the key and get A Dusty Sack which will yield an uncommon, rare, or epic quality item related to your level and some gold.
If you complete the puzzle again, you will receive A Dusty Sack which will yield at least one trash item worth 1 silver each.