You spend a single (1) gold piece (GP.) The door slams shut behind you and will not re-open. The night is long. Morning does not bring the usual chamber crowds. Far, far in the distance you can hear muffled cries and a crashing, grinding sound, of perhaps a great mechanical disaster. Hours pass. There are sounds of struggle to the N, and later to the E. A low, pained wail begins somewhere beyond the Orange Chamber, beyond the Yellow Chamber, continues through all the night, and then intermittently throughout the next three days. Finally, it falls silent. You test the bars with your powerful arms, but they refuse to budge. Now you can see: set into the wall opposite your cell, by the archway illumined by orange radiance from the chamber beyond, is a white plate with a black keyhole at its center. The glowing Triangle Key in your pocket looks the perfect fit, and pairing the two will surely open the shielded alcove in the wall to your left. You test the bars with your powerful arms, but they refuse to budge.