Part Two: Editions of The Treatise on the Definition of Fever and Its Essence in Its Medieval Versions and English Translation: Chapter 6: The Old Spanish Translation: Introduction: 2: The Language of the Old Spanish Version.

The article discusses the characteristics and details of the manuscript containing the Old Spanish translation of "De febribus," which is found in the library of the Royal Monastery of San Lorenzo of El Escorial. It provides information about the manuscript's physical attributes, such as its foliation, writing styles, and missing folios, as well as the linguistic features of the Old Spanish text.