>It's very unlikely that > > a scribe repeats the same mistake over and over again.
Well, sure it is likely. If he had discovered his 'mistake' he'd go back and correct it. He could have made a mistake with the first instance and then copied it over and over thinking it was just the same chord. I've done that. cheers -- Ed Durbrow Saitama, Japan http://www9.plala.or.jp/edurbrow/