Talk:O salutaris hostia (Pierre de la Rue)
It seems that the versions presented on this page differ in text underlay. For instance, #44693 has "Fer, fer auxilium" for the tenor's last notes, while #07549 has "Fer auxilium" for the same notes. At home, I have a music book, Vox Neerlandica, which includes yet another version for the tenor. Vox Neerlandica cites Monumenta Musica Belgicae as its source.