In 1967, Charlie Chaplin told an interviewer, "I think I like City Lights the best of all my films." Speaking of the film's famous ending, James Agee wrote that "it is enough to shrivel the heart to see." Although City Lights had a long and extremely difficult production history, the final film, in Alistair Cooke's apt words, flows "like water over pebbles, smooth and simple for all to see with no hint of the groaning pressure that had...