His right hand rose from the arm of the chair and, with index finger pointing down, rotated slowly to indicate I should turn around. As I did so, a huge display screen slid down from the false ceiling, flickered to life and shared computer graphics of Seattle with me. As I watched, the image swooped lower, like a helicopter sailing down through vector-graphic canyons. As it headed north from downtown it hit a block of solid green: the Ancients' turf.