vii

study the sensibly planted maps as while walking to the primary platform for waiting .. look for the ceiling but see a sky instead, with concrete clouds .. follow the broad painted arrows .. rectangular clouds in a geometric dome forming a half-cylindered tunnel in the underground .. people move quickly up & down the stairwells .. the main floor opens unto a cavern concrete revealing additional layers; platforms, stairs, tracks & trains; the descent into the underground is by way of broad formal stairs, several levels .. tickets are available by the central kiosk which is peopled or by machine ..