I have a 90 minute cassette of the Early Show 1/2/70 in B grade AUD; its Cosmic Charlie breaks off. I also have a 10 minute snippet of AUD tape recording how, before the Dead began their early show the Thus Spake Zarathustra theme (you know it from the movie 2001) of Richard Strauss was played over the PA, and then the Dead segued into Mason's Children. This snippet is C grade AUD, I've never figured out whether it's the same or a different master. If I remember correctly the other tape doesn't have the prologue. I can arrange to upload these to DAT for you, Hanno, if nobody has a better copy, but I warn you my copies aren't great.
As to whether the the set beginning with the Masons is the EWarly or Late show, I think it's the early, and I weigh the evidence that way.
