Written in medieval Latin, probably by Bishop Arnold of Astorga, the Chronica is an account of the reign of Alfonso VII. The second book details several of the major campaigns of Reconquista from this time. The siege of Coria of 1142 is the subject of §§64–66 (the sections are numbered from one [1] for each book). The edition of the Chronica used throughout is G. E. Lipskey, The Chronicle of Alfonso the Emperor, PhD thesis (Northwestern University, 1972), who numbers all the sections of both books consecutively (book II beginning with §96).
Peter in his Prologus in Libro contra sectam siue haeresim Saracenorum explicitly places this in 1142, but elsewhere he writes “with Don Alfonso the victorious emperor of the Spains I had a colloquy” (cum domno Adefonso uictorioso Hispaniarum imperatore colloquium habui), evidently referring to a meeting circa 29 July in Salamanca after the victorious siege of Coria. Cf. Charles Julian Bishko, "The Cluniac Priories of Galicia and Portugal: Their Acquisition and Administration, 1075–c. 1230", Studia Monastica 7 (1965) 305–58, reprinted in Spanish and Portuguese Monastic History, 600–1300 (London: Variorum Reprints, 1983), chapter 11, with the same pagination.
