Your pains to sterilize 'Bach' from his London family, friends and associates, are praiseworthy Robert but don't you find it of importance that his son, the aforementioned Claudius Amyand jr(aka Frederick de Nicolay, Immanuel Kant, J.J.Rousseau etc ), married Frances, daughter of rev Thomas Payne, on November 26, 1761?
Or that she, Frances, had also a brother, Thomas or Tom, bookseller/printer (1719-1799), address: 1) next the Mew's Gate, near St Martin's Church in Cheapside 2) near the South Sea House, Bishopsgate Street?
Were these Paynes related, I wonder, to the second Grand Master (freemason) George Payne (succeeded by John Desaguliers in 1719, ie Handel/Bach/HM's doctor Claude senior Amyand)?
Or to the "other" Thomas Paine (of MacDonalds)?
Naaaah, too paynefull to believe true!
http://en.wikipedia.org/wiki/George_Payne_(Freemason)