Dennis was an extraordinary artist. He did art work continuously from an early age. His work is often figurative. Quite often it is of the irrational or the paradoxical, made to seem normal. It often depicted an intrusion of the strange into the mundane. Dennis worked with bird quills and bamboo pens with ink. He used metal point stylus made of silver, lead and tin instead of graphite. He often painted on heavy watercolor paper or gessoed panels with tempera. Now, his tools and subject matter seem anachronistic, but they were in keeping with his love of past materials and techniques.