Ralph Cooper April 24, 1935
Lubbers includes this session though it was never issued. It is not in Varela or Lord. Ralph Cooper was an actor who served as MC at the Apollo, and Lubbers names him as leader.
No other personnel are known. Sid Cooper is an alto saxophonist who played later on the Tonight Show, and did apparently accompany Holiday at some point, but, born in 1918, may not be the same one that Lubbers lists for this date.