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There are two things to say about this two song segment. One is that it is the finest Sabbath performance I have ever heard. The musicianship is outstanding. Behind the Wall of Sleep and Walpurgis, an early version of War Pigs with different lyrics. The other thing I can say is that there is a major problem with the high treble, specifically the drummer's cymbals. It is somewhat annoying through much of the first track. I only posted this because to me this is the best live Sabbath ever.