Di Carlo G. manuscript (ca. 1600-1620)
This manuscript has surfaced only recently. The finding and first examination of it were by Roman Chalda.
Here you can read his Bachelorarbeit concerning the manuscript, which includes also the story behind its finding. The manuscript is currently under study, but here is a short introduction.
As can be seen immediately, the most impressive thing about this manuscript is the vast amount of written-out keyboard accompaniments; such specimen is very rare in the early 17th century. This kind of account is precious as it may give us an authentic impression of what was actually played and sung (as opposed to most cases where we have pieces with unrealized basso continuo). In terms of content, most of the manuscript includes liturgical pieces in Latin for one or two ornamented vocal lines and keyboard accompaniment. Four vocal pieces are found in two versions; one with keyboard accompaniment, and one with lute accompaniment (tablature notation).