My copy of this shows that the tunes with just Byas are from the same concert as If I Had You, Take the A Train, Ergo and Lester Leaps In. That is they are recorded live at the Scala concert halol in Arhous Denmark "circa 1959". . . .
Says the r-section is Bent Axen, NHOP, and William Schoiffe. . . so different spelling for the drummer and obviously NHOP credited on bass.
The Topsy and My Funny Valentine tracks are credited with an r-section of Paul Godske, NHOP and Alex Reil, from "a TV broadcast circa 1961."
Both sections could well have NHOP within according to my ears, for what that's worth.
I have a custom made cdr that purports to be from Jazz Mark 101.
I like the TV broadcast tracks the best myself. It's interesting to hear the two horns with the same section though, Brew being more Presidential, and Byas being more Bean-like. . . .