It features along with Wardell Gray a trumpet player seldom mentioned, but deserving more attention
I didn't include this in my post, but it was / is in the notes:
"...Still he(Morgan) fared better than his studio mate(Wardell Gray). Within a few weeks of the recording session Gray turned up dead in the Nevada desert, by most accounts directly or indirectly a victim of his drug habit."
Really, Really sad, and what a waste. We can only guess what "directly or indirectly" refer to.
Cheers