I have just come across a listing that gives, in addition to what I had, Mick Doonan and Bob Thomas. Mick is listed on the net as playing, amongst other things, whistles and uilleann pipes, which answers another query, but Bob Thomas is a little more elusive. There is mention of a Robert D Thomas, American, 1938-1993, maker and player of bagpipes, including a Zampogna, Italian pipes with two melody chanters, which could also explain Robyn's comment above. Can anyone add anything to this?