I agree Roger - Empty Pocket Blues is classic, but it was written by banjo player Clive Palmer, who left the ISB after the first (and probably best) album, and before Mike Heron stumbled into the Church of Scientology which had set up a base in Edinburgh in the late '60s. Clive went on to form COB (Clive's Own Band)and issued an album called Moshe McStiff and the Tartan Lancers of the Sacred Heart, a record mostly remarkable for containing a song predicting the downfall of Ethiopian Emperor H.S. By the time they got to "U" the ISB were not just a huge disappointment but a gigantic embarassment on stage - e.g. Candleriggs in Glasgow. (Groans at memory)