Art Blakey is joined here (at least on the A-side) by Cuban drummers Candido and Sabu, with Ray Bryant, Oscar Pettiford, and Charles Wright. On the B side, Jackie McLean, Spanky DeBrest, Sam Dockery, and Bill Hardman join as the Jazz Messengers. My copy—via private sale—is a 1950s Columbia Hollywood plant pressing with the 6-eye…