This photograph shows how many props, bibelots, and other furnishings filled Walter Gay's own studio. In looking for a photo of Carolus-Duran in his for comparison, I was delighted to find that a post—Where the Light Falls: An American Artist in Paris—is still available at the American Girls Art Club in Paris … and Beyond website. It has many images that illustrate the novel, including one of Carolus in his studio at his organ.