Alex,
Could you please check the web pages for your images. I am getting "Page Not Found" for each of them.
I did get a brief look at some of the images before they disappeared and Ray may be right about some of the canes appearing in items shown in the PCC 1999 exhibition page he linked to. But I suspect that it is unlikely that "most" of the canes are included there as the items are mainly scent bottles which could have been made in the later years of the 19th century.
Since the date 1848 is included in the Anita murrine, it is likely that these are the work of Giacomo Franchini, son of Giovanni Battista Franchini. Some of the millefiori canes may be by G B Franchini.
If the images can be retsored, I will check each of them against examples shown in the books by Giovanni Sarpellon, who was most likley the person who first verified these items for the owner.
Unfortunatley, I know almost nothing about the micro-mosaics that are shown. But I think they are excellent.
All of these items really belong in a museum - such as on Murano. But I know that some paperweight collectors would be very happy to have these in their collections and would probably pay quite a lot of money to secure them.