I think that very Black Lion disc was my second-ever Mal purchase (maybe 15-18 yrs ago) — after Free At Last (1969) perhaps a year before.
Funny story — I was in a Half Price Books and heard some distinctive, brooding piano-trio thing on the overhead speakers throughout the store. And even though I wasn’t steeped in Mal at the time (not at all), I felt strongly it might have been him… and I made one of the HPB employees go find the 6-disc player in the back office, and after I’d followed him to the back of the store, he came out of the office with 6 empty jewel boxes saying “one of these”. And low and behold, it was that Mal Black Lion disc.
I asked him if it was a disc they’d pulled from the for-sale stock out on the floor, and when he said yes, I said I’d take it! Got it home, and discovered that it was that extra ‘bonus’ live album (just two long tracks) that I’d heard in the store.
And then within 6 months I think I’d tracked down close to half-a-dozen other Mal discs (specifically from the early 70’s), most of them live.