Added 3 new items to the Trombone History Timeline, all from the 20th century and all pertaining to jazz. They are photographs that include trombones in groups headed by W. C. Handy and Duke Ellington, as well as a photo of the “King & Carter Jazzing Orchestra” of Houston, Texas. One of the sources is an extensive set of photographs called the “American Memory” collection of the Library of Congress; the collection includes more than 160,000 photos of America from the Great Depression to World War II.