Listed by year of first publication or, for diaries and journals, first entry (where this is known).
Cockayne, [Thomas] Oswald (ed. and trans.), Leechdoms, Wortcunning, and Starcraft of Early England, 3 vols. (London: Longman & Co., 1864-6; repr. London: Holland Press, 1961, and Bristol: Thoemmes, 2001) [Anglo Saxon]
John of Salisbury, Policraticus (c.1159; various editions, translations and selections - check national libraries for details; online editions can be found on the websites of the Constitution Society and the Internet Medieval Sourcebook)