Male vocal quartets were commonplace in the 1920s and '30s, but there was nothing commonplace about the four young men from the Pacific Northwest who called themselves the Foursome. The group was originally formed in 1926 by two boys from Spokane, Marshall Smith and Dwight Snyder, along with Harry Isaacs and Kearney Walton. They toured theatres on the East Coast and recorded for Columbia with Paul Ash before splitting up. Isaacs and Walton (who went on to become a bandleader) were replaced by Jimmy Davis and Raymond Johnson in 1928; Davis soon left to be replaced by Del Porter...