the cardioid campus
E.T.A. is laid out as a cardioid, with the four main inward-facing bldgs. convexly rounded at the back and sides to yield a cardioid's curve, with the tennis courts and pavilions at the center and the staff and students' parking lots in back of Comm.-Ad. forming the little bashed-in dent that from the air gives the whole facility the Valentine-heart aspect
Context
The endnote confirms the campus's anatomy: E.T.A. is a cardioid, a Valentine-heart in plan, with the tennis courts and pavilions held at the literal center — the physical heart of the institution is the courts. Read against 013's Lung and Pump-Room-as-pulmonary-organ, the whole plant is a body built around tennis: heart-shaped ground, a lung under the middle courts, an athletic organism whose organs are all in service of the game at its core.