Leechdoms, wortcunning, and starcraft of early England. Being a collection of documents, for the most part never before printed, illustrating the history of science in this country before the Norman Conquest. Collected and edited by Oswald Cockayne. 3 vols.

This set contains many texts relating to medieval English medicine and the Anglo-Saxon language. It contains the Herbal of Apuleius in Anglo-Saxon and modern English, the Leechbook of Bald, the text of Sextus Placitus, etc., etc. Some of its scholarship has been superceded. Digital facsimile from the Internet Archive at this link.