Author
- Patrick Graham, 1st Lord Graham1
- Pedro de Serra1
- Petronia Lancenberg1
- Petrus Veronensis1
- Pierre Froissard1
- Pope1
- Pseudo-Cicero1
- Ranieri Farnese1
- Richard Bolter1
- Richard Treby1
- Richard de Geveldale1
- Robert Gazeley1
- Rolandino de' Passaggeri1
- Sallust1
- Sicco Polenton1
- Spain1
- Stefano Fieschi1
- Thomas Aquinas1
- Thomas Malyus1
- Usuard1