Solo Guitar - Level 4 - Digital Download SKU: A0.1217951 Composed by Doug Smith. 20th Century,Classical,Contemporary,Folk. Individual part. 6 pages. Doug Smith Guitar Studio #814472. Published by Doug Smith Guitar Studio (A0.1217951). River Ripples is the fourth piece of the St. Croix RIver Sketches. On a canoe trip we move upstream to William Obrien State Park where the river narrows a bit between islands and the rocky shore and we encounter some rapids and shallows.