Score: 25-byrd--have_mercy_upon_me_o_god----0-score.pdf
MIDI files:
| Num | Name | Cleffing; |
| 1 | cantusOne | part in treble clef |
| 1 | cantus_1 | part in treble clef |
| 2 | cantusTwo | part in alto clef |
| 2 | cantusTwo | part in treble clef |
| 2 | cantus_2 | part in alto clef |
| 2 | cantus_2 | part in treble clef |
| 3 | contratenor | part in alto clef |
| 3 | contratenor | part in octavated treble clef |
| 4 | tenor | part in alto clef |
| 4 | tenor | part in octavated treble clef |
| 5 | sextus | part in alto clef |
| 5 | sextus | part in octavated treble clef |
| 6 | bassus | part in bass clef |
CPDL link: https://www.cpdl.org/wiki/index.php/Have_mercy_upon_me_(William_Byrd)
IMSLP link: https://imslp.org/wiki/Have_mercy_upon_me_O_God_(Byrd,_William)