I purchased the LP of this music in the 1950's. Disposed of the LP when I picked up the CD (with 3 extra tracks) in 1999.
According to Gunther Schuller, this is the first recording of "Third Stream Music". It was Schuller and John Lewis who are regarded as the initiators of "Third Stream Music".
Just Listened to my CD of this music after not playing it for quite a few years. Particularly impressive, to me, were the wonderful solos(on some of the tracks) by Lucky Thompson.
It seems that the arrangements of the music on the album have never been performed again.
It was a pleasure for me to listen to this album after a number of years.