Hoffman had trained with the French sculptor, Auguste Rodin, and in 1910 first met Rodin’s founder, Eugene Rudier, who used the foundry mark of his father, Alexis. Hoffman had hired a foundry worker to help her cast 27 sculptures in lost wax in her Paris studio fireplace in the early 1920s but like Rodin seemed to prefer the high quality sand casting done by her great friend Rudier. She wrote that he visited her at home in Paris almost every evening to report on progress at the foundry where 60 workers were casting sculpture for Races of Mankind.

From the exhibition:Frontier to Foundry: the Making of Small Bronze Sculpture in the Gilcrease Collection, December 2014 - March 2015.
Ann Boulton Young, Associate Conservator for the Gilcrease Museum, 2014.