N ^ Index /|\ ------- | D: door | Su: stairs going up | Sd: stairs going down _ | | Su | | (to 1st level) | | \_ \_ | | \_ \| | \_ |_ | \_ | |\_ \_ | | \_ \_ | | \_ \_ ___ | | \_ \_ | |_________| |________\ \ | D_________ ________ ) _|D.D|___ | | __/ / _/ _/__| |_____| | __/ __/ _/ _/ S D __D_____ | _/ __/ _/ _/D_D| |D | | |/ _/ _/ _/ _/__|__| | | _/ _/ ____________S | |__/ / _/ |_____| Sd (to 3rd level)