ABSTRACT
The nine movements of the Missa de nostra Dona are in various keys, as is to be expected in music derived from different chant sources; such is in fact routine in BVM masses. Certainly the presence of the three Anchieta movements in other contexts suggests, that they were written separately, and they are separated further from the Escobar movements by clefs and tessituras, if not by absolute ranges. Finally, the communion, Beata viscera, returns to the communion text and melody in the standard mass for Marian feasts. Without an ascription it is impossible to be sure, but the idea of Anchieta, assigned one year to produce a Marian mass for a Saturday between Christmas and Purification, taking some of his own existing movements and filling in the blanks, is an attractive one.
