Hillotype National Museum of American History, Smithsonian Institution Until his death in 1865, Hill maintained that he had made color photographs, though he confessed to having done so accidentally. He revealed that he had spent the last fifteen years of his life attempting to repeat the accidental combination without success. Recently new scientific evidence has suggested that Hill may have indeed stumbled onto a direct color process.
Herbert Keppler, "The Horrible Fate of Levi Hill: Inventor of Color Photography," Popular Photography, vol. 58, no. 7 (July 1994), 42-43, 140.
