the librettist died on palm sunday 2020, but I do not have his date of birth. I can find it if necessary. The text itself is actually from a direct correspondence between the two of us and it not a published poet text of any kind.
The piece is a whole work, but it is in a series. There will be Flute Cantos, Cello Cantos etc. The complete thing "given words" will be in 3 books eventually, but these suites are completed works.