They were both juiced, which was their 'natural' state at the time (late 1960s). I've seen them many times, on and off stage, both alone and together. Ben became slow (and sentimental), but Don could still play his ass off even when he hardly could stand upright. He drank three double whiskys and smoke a big reefer anyway before playing at all.

I'm sad to read that Larry's phone has been disconnected. Being hospitalized or in a nursing home doesn't usually = no phone, so something bad might have happened.

A perfect disc to listen to with a blank sheet approach is "Sonny Meets Hawk!". I have read somewhat opposed reviews as regards how Sonny Rollins challenged Hawk. 

I see there are a huge variety of different listening prefernces among Bird fans, either complete with all the laternates or master takes only.  So, further to the JSP public domain set that Mikeweil showed, here is another approach that might satisfy those who like to experience the music in the exact compiling and track order of the original or "period" releases from way back. (Yes I know the CD set shown under the below link is one of those P.D. sets that some will immediately sneer at. But if found cheaply ... - My copy, for example, came my way at a clearout sale several years ago - and at 1 EUR for a TEN-CD set you cannot go wrong and might as well consider it a freebie ). Anyway ... this set combines the music "as is" from a number of 10" and 12" LPs originally released in the 50s and early 60s on Dial, Savoy, Mercury, Clef, Jazz Workshop, Le Jazz Cool and some others.  So as a complementary item with a somewhat different compiling order it might serve some purpose here and there ... https://www.discogs.com/release/11693423-Charlie-Parker-Milestones-Of-A-Legend

So Büchmann-Møller did not dwell on the clash of personalities or animosities that seems to have developed between Webster and Byas during that session (as Con Chapman explained in his Byas biography)? It seems easy to imagine that they were not at their top on that occasion, given these problems. Will try to listen to that disc with a "blank sheet" approach anyway.  @Late: Thanks for your feedback.