Horst, Louis (12 January 1884–23 January 1964), composer, arranger, dance critic and pedagogue, and publisher, was born in Kansas City, Missouri, the son of German immigrants Conrad Horst, a cornet player, and Corline “Lena” Nickell. Horst’s family traveled to San Francisco, California, in 1893, where Louis studied violin and piano. From about 1900 to 1914 he worked as a pianist in pit orchestras and for silent films. While working at a summer resort he met and subsequently married in 1910 eighteen-year-old Bessie (called Betty) Cunningham. They had no children. In 1911 they went to New York City, where he continued to work as a part-time musician and studied composition and piano, but they returned to San Francisco by 1914....