In a slumber late as I was
| Composer | Anonymous |
|---|---|
| Genre | Carol |
Appears in
| Source | Source Date | Location | Source Attribution | Voices |
|---|---|---|---|---|
| GB-Odiamm Virtual Reconstruction of Fayrfax/Drexel fragments | late 15th/early 16th century | Br (D.4180 front (r)) | - | |
| GB-Lbl Add. MS 5465 (Fayrfax MS) | c. 1500 | 122v–124 | - | |
| US-NYp Mus. Res. Drexel 4180 | 17th century and c. 1500 (flyleaves) | front flyleaf (recto)–front flyleaf (verso) | - |