The group flew every day after that.
The final practice day before the great expedition, the flight crew loaded sandbags onto all five aircraft to simulate their cargo. The autogyros took off in formation, Hildy Goldstein on point, all passengers aboard and black mercury in the boilers.
They flew over Lake Sherrat, low enough to make white caps on the water and to see the ferry passengers wave their hats. When they flew over the University, Adewole realized the yellow-and-red brick courtyards taken together made a larger pattern, a checkerboarded star. Was it intentional? Adewole wondered how many patterns could only be seen from the air.
The formation took no chances and skirted the financial district's steel towers, though they did fly into the Drift, beneath the island itself. Adewole did his best to stare up through the spinning rotors to study its underside, but he couldn't make out much detail.