A Bassus partbook from a set of six books; each has title page "Orlandi Lassi sex vocum", although a considerable number of other composers are included. Probably copied from Lassus's prints of 1565/1566 and Striggio's 1560 Madrigali a 6 lib. 1, inter alia. Only a few pieces are fully texted, the remainder usually having only a text incipit; the books may have been copied for instrumental performance (see BrinzingS 1998 and KörndleR 2019), and pieces from no. 62 onwards have instruments listed at the beginning, although parts are not allocated to instruments.

Written by one main scribe; a second scribe wrote nos. 107–113 in all parts; two other scribes copied parts in the Altus, and nos. 121-124 were added by later hands. Of South German/Austrian provenance.

Nos. 99–107 and 118–120 are missing from the Tenor book.

Original boards, half-leather, with voice-part inscribed

1579 on title page

No foliation or pagination. Original numbering of pieces 1-120, with individual partes sometimes separately numbered. (Nos. 121-124 added in score by later hands). Modern pencil pagination.

Alphabetical listing of pieces at front of Discantus only.