The Winching Machine                                   -      N      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      -      -

In this room stands an incredible marvel, down below the slaves pile
their ore onto the conveyor belt which then brings the rocks up to this room
to the smelter's stock pile.  The conveyor belt itself is powered by some
magical power never seen before, moving smoothly the belt loops and
disappears back to the room below.  The slaves hop on the belt as it moves
down, catching a ride back to their labors.  
A soot covered slave toils away here for his master.