In the spring of 1894 Reuben Gold Thwaites, historian and State Historical Society of Wisconsin director, accompanied by three family members journeyed nearly 1,100 miles down the Monongahela and Ohio Rivers in a fifteen-foot rowboat. This title documenting Thwaites's trip features approximately seventy circular black-and-white photographs taken by Thwaites with his #2 Kodak camera and the historian's descriptions about each image. Also included are the essays "Reuben Gold Thwaites: Clio's Pilgrim" by Robert L. Reid and "Reuben Gold Thwaites and the Circular Snapshot" by Dan Fuller.