AHHHHHHHHHHH!!! Thankew - Yes, it was TOMMY Potts. At least that's how I remember being corrected, in an Irish e-group who's pretty clued up about such things. [Well, I got the "Potts" bit right anyway...]

John Docherty may well have played another tune with "Butterfly" in the title - he had a treasure-trove of music at his fingertips, and some of his pieces went under different names than they were known by elsewhere.