This is the complete work. All four parts had been released separately, including Ouzel (pronounced oozle), which was originally released as "A New Unknown." Thanks to Mystified, who sings on Parts 1 and 4. This piece is dedicated to her.

(What is an ouzel? It is a bird, also known as an American dipper, that 'flies' under white water in rivers like the St. Vrain in Colorado. Quite a sight. If you ever have a chance to hike along the St. Vrain up to Ouzel Falls, watch for the dippers.)