Source E-TUY (Tuy) Archivo Capitular de la Catedral de Tuy L V Folio 053v-055r Sequence 001 Text Ego autem humiliates (Credidi propter, tone 6) Feast De BMV Liturgical occasion V Genre PS Number of voices 4 Composer Anonymous Marginalia Headed: ‘Credidi A4. vj Tono’ Images 053v-054r
