String quartet version by Roy Harris by THE ROTH QUARTET with the conjectural completion of the great unfinished quadruple fugue composed and played by SIR DONALD TOVEY . This is a historic document in more ways than one. This recording of Bach's ultimate musical statement was made in the USA in 1934 and was issued as a luxury limited edition set in the UK. The Tovey completion was recorded in 1935, and is a must for all Bach scholars. One of the great recordings of all time.