Listening to a River City Brass Band concert on WQED FM HD2 featuring the music of John Phillip Sousa. Right now they are playing a Herman Bellstedt piece called Napoli with solo euphonium. Interesting as it is normally played on cornet/trumpet. I have played it myself on both cornet and trumpet. Herman Bellstedt was a solo cornetist with the Sousa band in the early 1900's along with Herbert L. Clarke.