we have a similar Situation (but this time vice versa) on September 19, 1949 also at carnegie hall and also at jatp. it´s on disc 3 of the (at that time) complete Charlie parker on Verve 10 cd box. track 8 "perdido": during the end of ella´s vocal on perdido, the Applause and shouting builds and one hears "hawk" (he performed at this concert) called out. "perdido" was flip phillips Domain, but the Tenor solo does begin with a hawk like lick and contains a few other Hawkins style phrases.... from the liner notes on page 28/29.
Keep boppin´
marcel