I’ve been thinking about the water underneath this city, the water underneath our feet. It’s hard to see other than when it comes up in lakes and wetlands and rivers and sprinklered bores. But it is there, under the Swan Coastal Plain—Whadjuk Country. I think of Archimedes displacing water in his bath. I think of the brain displacing spinal fluid. Maybe this underground water is holding up a buoyant country, a buoyant city, as the water in the body holds up a buoyant brain.