English and the largest part is that of a computus similar to the one in Preface. It touches on the belief that the divine order of the universe can be perceived through the study of numbers and can be of great reference for the study of medieval number symbolism. It also contains treatises on rhetorical and grammatical subjects, a table of weights and measures, and three theological tracts on the ages of the world, the loosing of Satan and the eight capital sins. Preface St John's College, Oxford MS 17 contains several computistical works by Bede and Helperic, and a computus which includes the Latin Epilogus, or Preface, by Byrhtferth. He also constructed a full-page diagram showing the harmony of the universe, and suggesting correspondences among cosmological, numerological, and physiological aspects of the world. Other items in the manuscript may in fact have been written by Byrhtferth, but it cannot be proved. Also, he may have compiled most of these things from works that Abbo of Fleury left behind at Ramsey Abbey after his death. Published works Byrhtferth's Manual (AD 1011) (1929). Edited from ms. Ashmole 328 in the Bodleian library. With an introduction, translation, sources, vocabulary, glossary of technical terms, appendices and seventeen plates by Samuel J. Crawford. Published for Early English Text Society, Original series, 127. Byrhtferth's Enchiridion, edited and translated by Peter S. Baker and Michael Lapidge. Oxford: Published for the Early English Text Society, Supplementary series, 15, by the Oxford University Press, 1995. References External links Anonymous life of Oswald (in Latin), pg. 399 ff. 970s births 1020s deaths 11th-century English historians Christian hagiographers English Christian monks 10th-century English historians English chroniclers 11th-century English writers Medieval English mathematicians Medieval English astronomers 11th-century astronomers 11th-century mathematicians 11th-century Latin writers