I'm a seminary library director, and have discovered this choir book page in our museum work room. We have several medieval choir books in our collection, and this resembles a 15th c. Italian kyriale we have. The abbreviations are flummoxing me. I'm thinking Eastertide Gregorian Alleluia chant?
For many years I have had two large (about roughly 14x18 inches) which are difficult to put a date on. One, the better of the two, is probably XVI. century. The other, which is written with Roman letters, could be XVI to XVIII century. An irksome trait on both (does any one know the approximent date on which this degenerate practice began?) is that what would be podati are written as two left to right neumes joined instead of one over the other as an actual podatus would be written. Both have five line staves. The better of the two is Magiviventes, a Magnificat antiphon at vespers of the Epiphany. The text of the later one, Beatus didacus, also a vespers antiphon, I haven't been able to assign a day for.
The other two are the really beautiful ones. They are about 10x12 inches and the pages are elaborately decorated and the lettering quite carefully and clearly written. They each have four line staves. I am of the opinion that they are probably XV century, perhaps a little earlier or a little later. The text of each are antiphons for the Exaltation of the Holy Cross.
I should take them to the UofH or Rice to get a better opinion than mine.
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