Greg Stephens, of the Boat Band and other bands. Bloody fine bloke and all-round local English international traditionalist progressive.
Thomas Hardy wrote about church bands, the ones that got fired when the organs came in because they were invariably still drunk on the Sunday morning from the previous Saturday night's dancing. If whole bands were employed to accompany the hymn-singing in church one can assume safely that some harmony would be involved, if only because all instruments do not play in the same register (the Watersons' harmony technique:"sing the tune until you can't. What you sing after that qualifies as a harmony").
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