But the cars passed the tests the government designed. So did the materials used in Grenfell Tower. So do our kids when they do their SATs. Common thread anywhere?

But - back to thread; I initially thought 'maggot' a strange name; but then it seemed to me a logical way of describing the tune that comes out of the head, pretty well fully formed (the best ones, as any composer will tell you; there are plenty of poor ones needing hard work to knock into shape, but which are never so good, despite the work you put into them); and so the names associated with the maggot were probably of local musicians who played together, possibly all sharing one instrument since folks were not necessarily well off; and who occasionally played one of their own tunes, rather than a set of variations on a well known tune, which was the fashion.
Just my guess.