At twillight, the white front lights of the cars driving in one direction and the red tail lights of the cars driving in the other direction look like oxygenated blood being pumped away from the heart and used blood flowing back to the heart. A white Honda accelerates, merging with the lane driving onto the bridge. Spook has left the baby seat and Kirsty's dry-cleaning in the back of the car after collecting Pascal and Tintin from school. Changing gears. Turning on the indicators to move into the left hand lane.   next