An abstract mixed media painting titled Mystery of the Umbra by the American artist Harry Hilson (2935-2004). Signed and titled to the lower edge, the painting depicts a gray gouache background punctuated with vibrant color pencil and graphite designs. The painting is unframed. Harry Hilson was active from the 1950s-2000. He created a variety of works, including oil paintings, ink drawings, wool tapestries, and more. His studios could be found in New York, Los Angeles, and Aspen.