Something wholly penguin-shaped, apparently four or five feet long, from beak-tip to trailing feet, and made, it seemed, of mercury. A penguin wrapped in fluid mirror, reflecting a bit of neon from the street below. Swimming. Moving as a penguin moves underwater, but through the Latin Quarter air, at just above the height of second-story windows. Moving down the center of the street that crossed the one he walked on. So that it was revealed only as it crossed the intersection. Swimming. Propelling itself, in a gracefully determined but efficient fashion, with its quicksilver flippers. Then a bicycle crossed, on the street, going in the opposite direction.