MISALATH ASTROLOGUS (?).
PAPIAS (circ. 1053). Grammarian. [Milan, 1467, etc.]
PERSPECTIVA SCIENCIA. I cannot say whether this is Bacon's, Peckham's, or Albertus Magnus', but I believe it to be Peckham's, who was an Englishman, and afterwards Archbishop of Canterbury.
PETRUS COMESTOR (d. 1198). Named MAGISTER HISTORIARUM or Master of Histories, wrote an account of the world from the Creation, which, when translated into French, was called the "Mer des Histoires." A favourite Medieval book.
PHILARETUS (1100). A writer on Medicine.
PHYSIOLOGUS. A Syriac compilation of moralities on animal myths. It first appears in Western Europe as THEOBALDUS DE NATURIS XII. ANIMALIUM. Of Alexandrian origin, it dates from before the fourth century, and appears to have been altered at the will of each writer.
PLATEARIUS SALERNITANUS (circ. 1100) was Johannes, one of a family of physicians at Salerno. His work is called the PRACTICA. A book on the virtues of herbs. [Lugd., 1525, etc.]
PLATO (430-348 B.C.). The TIMAEUS is quoted, probably from Chalcidius.
PLINY (d. 79). Natural History. This and Isidore's work are the two chief sources of medieval knowledge of Nature.
PRISCIAN (circ. 525). Grammarian and physicist.