alto saxophone [uncredited], soprano saxophone [uncredited] Otto Hardwick
baritone saxophone [uncredited], alto saxophone [uncredited] Harry Carney
clarinet [uncredited], tenor saxophone [uncredited] Barney Bigard
double bass [uncredited] Billy Taylor Sr.
drums [uncredited] Sonny Greer
piano [uncredited] Duke Ellington
trumpet [uncredited], leader Cootie Williams
valve trombone [uncredited] Juan Tizol
Recorded in New York on October 26 of 1937.

According to the ledgers of this session (via the Mosaic set Duke Ellington: 1936-40 Small Group Sessions), Ellington isn't heard on Side A, but close listening reveals Ellington's presence on that track.
Matrix / Runout: M 671-1 (Side A)
Matrix / Runout: M 669-2 (Side B)