Abstract
Simon Bredon was one of a remarkable group of scientists who brought fame to Oxford by their achievements in the sphere of natural science, particularly in astronomy. Though his interests lay chiefly in the field of medicine, as indicated by the large collection of books on this subject which he bequeathed to his friends, he was also a mathematician and astronomer.The manuscripts of his works, still preserved at Oxford, Cambridge and the British Museum, which include an arithmetic, a commentary on the Almagest, a theory of the planets and astronomical calculations, have never been properly examined and some kind of preliminary investigation seems necessary before his true position among the Merton school of scientists can be assessed