In an interview with DownBeat published in February 1975, Mingus praised Jimmy Knepper as "probably the greatest trombone player who ever lived, " and lamented how long it had been since they had worked together.
Mingus failed to mention to the interviewer that, a decade before, as the big Town Hall concert loomed and arrangers were frantically arranging, Knepper and Mingus had argued over getting the parts copied in time.