“A propeller?” asked March. He had seen bodies dragged out of busy waterways — from the Tegler See and the Spree in Berlin, from the Alster in Hamburg — which looked as if butchers had been at them.

“No.” Eisler withdrew his hand. “An old amputation. Rather well done in fact.” He pressed hard on the chest with his fist. Muddy water gushed from the mouth and bubbled out of the nostrils. “Rigor mortis fairly advanced. Dead twelve hours. Maybe less.” He pulled his glove back on.

A diesel engine rattled somewhere through the trees behind them.

“The ambulance,” said Ratka. They take their time.”

March gestured to Spiedel. Take another picture.”

Looking down at the corpse, March lit a cigarette. Then he squatted on his haunches and stared into the single open eye. He stayed that way a long while. The camera flashed again. The swan reared up, flapped her wings, and turned towards the centre of the lake in search of food.

TWO

Kripo headquarters lie on the other side of Berlin, a twenty-five-minute drive from the Havel. March needed a statement from Jost, and offered to drop him back at his barracks to change, but Jost said no: he would sooner make his statement quickly. So once the body had been stowed aboard the ambulance and dispatched to the morgue, they set off in March’s little four-door Volkswagen through the rush-hour traffic.

It was one of those dismal Berlin mornings, when the famous Berliner-luft seems not so much bracing as merely raw, the moisture stinging the face and hands like a thousand frozen needles. On the Potsdamer Chaussee, the spray from the wheels of the passing cars forced the few pedestrians close to the sides of the buildings. Watching them through the rain-flecked window, March imagined a city of blind men, feeling their way to work.