Yet Begley doesn’t end “The Great Nadar” here. In a substantial appendix, titled “Mementos of Nadar’s World,” he presents a gallery of the notables who visited the photographer’s studio. These included the anarchist Mikhail Bakunin, the former French prime minister François Guizot and the journalist Alphonse Karr, now mainly remembered for his immortal epigram, “Plus ça change, plus c’est la même chose,” the more things change, the more they stay the same.