A few detailed problems may be mentioned.

1. Only one of the pieces, no.1, has the so-called plagal cadence which is so typical for frottole, although it is possible that three others might have had one, in the alto and bass parts only (no. 2, 4 and 7).

2. no.3 ends with double notes in both the surviving parts; this is often an indication that a piece contains canons, but up till now I haven't been able to find any.

3. nos.6 and 7: as already mentioned, the two surviving voices fit together for the most part, but there are gaps in both, if they are to sound together. Of course, it's common enough that a scribe left something out, but these missing bits are rather long, and it has happened in both voices, in different places.

These problems remain, and a number of reconstructed passages are not entirely convincing - I should be glad to hear from anyone who can suggest improvements.

But on the whole, I think one can say that, if the original pieces were not quite the same as the reconstructions presented here, at least they could have been.

Many of them are rather fine, and well worth the trouble of rescuing.