Recorded: Buenos Aires, Argentina September 1968  Personnel: Paul Gonsalves - Tenor Sax Willie Cook - Trumpet Enrique Villegas - Piano Alfredo Remus - Bass Eduardo Casalla - Drums  * In September 1968 Duke Ellington and his band  visited Buenos Aires. The local jazz pianist  Horacio &quot;Mono&quot; Villegas invited Duke&#x27;s trumpeter,  Willie Cook and tenorman Paul Gonsalves  to join him at a local recording studio.  They had never met or played together before.