Manuscripts containing Greek medical texts were inventoried by author and work at the beginning of the 20th century by a group of philologists under the direction of Hermann Diels. Useful as it was - and will continue to be – Diels’ catalogue omitted authors and works, misidentified manuscripts, and overlooked codices. Furthermore, since the publication of the catalogue, some libraries have adopted a new system of classification, manuscripts have been destroyed, items have changed location, and new ones have come to light. The present Census is a checklist of the Greek medical manuscripts currently known in collections worldwide. It is both an amended and updated index of Diels’ catalogue, and a list of the items missed or overlooked in Diels, or located since. Although it does not supersede Diels’ catalogue, it is the indispensable instrument for a New Diels, and will be the reference for years to come for any new critical edition and medico-historical research based on manuscripts, besides providing the basis for a broad range of other historical inquiries, from codicology to the history of medicine and science, including Byzantine intellectual history, Renaissance studies and humanism, history of the book and early printing, and the history of medical philology and learning.

This alphabetical catalogue documents John Willis Clark's collection of over ten thousand Cambridge-related books, pamphlets and pieces of print.

The medical literature of ancient Greece has been much studied during the 20th century, particularly from the 1970s on. In spite of this intense activity, the search for manuscripts still relies on the catalogue compiled in the early 1900s by a group of philologists led by the German historian of Greek philosophy and medicine Hermann Diels. However useful the so-called Diels has been and still is, it is now in need of a thorough revision. The present five-tome set is a first step in that direction. Tome 1 offers a reproduction of Diels’ catalogue with an index of the manuscripts. The following three tomes provide a reconstruction of the texts contained in the manuscripts listed in Diels on the basis of Diels’ catalogue. Proceeding as Diels did, these three tomes distinguish the manuscripts containing texts by (or attributed to) Hippocrates (tome 2), Galen (tome 3), and the other authors considered by Diels (tome 4). Tome 5 will list all the texts listed in Diels for each manuscript in the catalogue. The present work will be a reference for all scholars interested in Greek medical literature and manuscripts, in addition to historians of medicine, medical book, medical tradition, and medical culture.