Аннотация:The study of the sources of the Anglo-Saxon medical texts began more than a hundred years ago with T.O. Cockayne's monumental edition of most of the medical, magical and herbal material extant in Old English. Cockayne demonstrated that the most significant text in this corpus, the late ninth-century compilation known as Bald's Leechbook , drew on an impressive range of Latin source materials. Recent work by C.H. Talbot and M.L. Cameron has further extended our knowledge of the classical texts which underlie the Leechbook . Among the significant sources is the text known as the Physica Plinii . Although the Physica survives in several recensions, there has as yet been no systematic study of the relationship between these recensions and the version of the Latin text used by the Old English compiler. The present article investigates Bald's Leechbook as a witness to the history of the Physica Plinii , and demonstrates the complexity of the transmission of the latter work.