Abstract Manuscript and printed music, correspondence, writings, clippings, photographs, and memorabilia of this Chicago music theorist, teacher, and critic. The German-born Ziehn taught such notables as Grace Chadbourne and John Alden Carpenter and also wrote textbooks on harmony and composition; he was known for his original and unorthodox musical views. Music includes Ziehn's own works in addition to works of other composers, often with Ziehn's manuscript notes. Correspondence includes letters...