"Sulfur Dun" Watercolor and Sharpie Pen. This fly is dedicated to Darrel Stark. Darrel's friend Jean had requested the fly in an email. Unfortunately Darrel Stark recently passed away. You can read more about Darrel's story here. As Jean put it, Darrel died at the age of 62 of an enlarged heart, the enlarged heart he had for fly fishing, his family and friends.