| Titles | MS and Item no. | IMEP volume |
|---|---|---|
| De occultatione anuli | Trinity O.5.26 [16] | 11 |
| De occultis | Trinity O.5.26 [16] | 11 |
| De oculo morali | Trinity B.15.35 [1] | 11 |
| De officio militis | Rylands Eng 412 [4] | 2 |
| De officio pastorum | Rylands Eng 86 [1] | 2 |
| De officio regis | Douce 273 [2] | 4 |
| De papa | Rylands Eng 86 [2] | 2 |
| De peccatis | Douce 302 [1] | 4 |
| 'De penis inferni' | CUL Hh.1.12 [14] | 19 |
| 'De pentecoste' | CUL Dd.10.50 [40] | 19 |
| 'De peste' | Trinity O.8.29 [11] | 11 |
| De pestilentia | Trinity O.1.77 [3] | 11 |
| De pestilentia | Trinity O.2.13 [27] | 11 |
| De pestilentia | Trinity O.2.40 [A 52] | 11 |
| De pestilentia | Trinity O.8.29 [11]-[13] | 11 |
| De pestilentia | Trinity R.14.52 [41]-[42] | 11 |
| De pestilentia | Trinity R.14.32 [14] | 11 |
| 'De phisonamia' | Caius 457/395 [47] | 17 |
| De phlebotomia | Ashmole 1477 [3] | 9 |
| De phlebotomia | CUL Dd.10.44 [5] | 19 |
| De phlebotomia | CUL Ee.1.3 [5] | 19 |
| De phlebotomia | CUL Kk.6.33 [12] | 19 |
| De phlebotomia | Laud 553 [12] | 16 |
| De phlebotomia | Trinity R.7.23 [2] | 11 |
| De picturis armorum | CUL Dd.10.52 [1] | 19 |
