Volume Six: 36 studies. The most challenging to perform and the most difficult to coordinate with accompaniments, these studies are numbered 74 to 109 (excluding 106) by Rochut, and there is one more study not transcribed by Rochut. The companion CD-R is a data disk with the music in MP3 files - over 3-1/2 hours of accompaniments. The CD-R includes ten accompaniments at slow, practice tempi, and seven accompaniments transposed to Rochut's keys. In addition, the CD-R includes PDF files with scanned images of Bordogni's own vocal-and-piano score and images of two 1897 G. Schirmer volumes edited by Max Spicker. 86 pages.