O Lord how long wilt thou forget
| Composer | Anonymous |
|---|---|
| Genre | Anthem |
Appears in
| Source | Source Date | Location | Source Attribution | Voices |
|---|---|---|---|---|
| US-NYp Mus. Res. Drexel 4180 | 17th century and c. 1500 (flyleaves) | 67v–68 | - | |
| US-NYp Mus. Res. Drexel 4181 | 17th century and c. 1500 (flyleaves) | 67–67v | - | |
| US-NYp Mus. Res. Drexel 4182 | 17th century and c. 1500 (flyleaves) | 69v–70 | - | |
| US-NYp Mus. Res. Drexel 4183 | 17th century and c. 1500 (flyleaves) | 44–45 | - | |
| US-NYp Mus. Res. Drexel 4185 | 17th century and c. 1500 (flyleaves) | 63v–64 | - |