The last of the fugues from Manuscript Becker III.8.51, owned by the Universitätsbibliothek Leipzig, is a fugue in again a minor. Where the other two fugues in a minor from Marpurg I already published (a our part one and a five part one) are rather solid pieces that need a plenum registration to play (at least to my ears) this fourth fugue is of a much lighter character. It has a nice chromatic theme, that Marpurg develops very nicely. Even though the bass voice goes quite high in this fugue (it reaches the e in the one-lined octave) the manuscript specifically indicates it should be played with the pedals. So, again, I rendered this fugue as a three staves score.
Score available here: http://partitura.org/index.php/friedrich-wilhelm-marpurg-fuga-in-a-moll-a-3