You are right Sedeayne (earlier contributor to this thread) Amazing Blondel used the crumhorn to interesting effect, mainly the alto although Wincott used the bass to comic effect after John Gladwin left the group. Gryphon were operating during the same time, early 1970s, and Richard Harvey and Brian Gulland (later to join Gabriel Yacoub's Malicorne) used them to mesmerising effect. (See Talking Elephant Records for Gryphon's re-released first 3 albums). And yes, you are right, the late David Munrow was on Shirley Collins' "Anthems in Eden Suite" using crumhorns. I myself played them with the group Rebec back in the 1970s and 1980s and I currently play them, rauschpfeife, recorders and shawm with the ceilidh band Madcap and still enjoy them. However, if I had a pound for every time the midget's hockey stick or umbrella joke had been made at me then I'd be quite rich!