When they finally reach the back entrance to Erik's house, where Joseph Buquet was found hanged, they drop into what turns out to be Erik's torture-chamber. This chamber contains heat-reflecting mirrors that reach from floor to ceiling, with an iron tree in a corner, making its occupant feel like he or she is in an unending forest of trees made of iron. (Buquet had stumbled into this room and used a Punjab lasso hanging from a tree branch to commit suicide.)