Puerto Rican trombonist Juan Tizol contributed two of the great songs of the classic jazz repertoire, "Caravan" and "Perdido", both of which he co-wrote. He joined the Ellington band at 29 and a second trombonist in the band for the first time allowed Duke another sound for his palette. Some credit Tizol as a pioneer in both modal jazz and latin jazz. His career was mostly spent with Ellington and Harry James. "Caravan" happens to be one of my very favorite songs.