Meandering more than 200 miles through southern England, the River Thames has been the setting for history both momentous and quirky. Take, for example, swan upping. “It’s a purely British thing,” explains the London-based photographer Julia Fullerton-Batten, who reimagined the centuries-old practice as part of her series Old Father Thames . In medieval England, swans were valuable articles of trade. By law, the beautiful birds belonged to the crown—all except those marked by other official swan owners during the annual swan upping (or census). The custom still takes place each July, although now only to count the fowl and check their health. For her cinematic composite image, Fullerton-Batten consulted with a retired swan upper, recreated 1950s-era uniforms, gathered authentic tools—and hired a trained swan, which was more likely to behave. “The whole thing looks a little surreal,” she says, “so it was important that it felt believable.”