While East Coast composers of the mid-1800s continued to imitate the music of their European forebears, Pittsburgh native Stephen Foster infused his compositions with the rich and diverse flavors of river life. By mixing this "western" essence with the style of traditional English folk songs, he created an original American sound. "Oh! Susannah," his first hit, became the banner song of forty-niners during the California gold rush. "Old Kentucky Home," "Old Folks at Home," "Camptown Races" and "Jeannie With the Light Brown Hair" are still sung a century and a half later. But despite the...