Time, creation and the continuum

was written c. 1450 in N. France. Such errors and omissions by Professor Ullmann do not seriously diminish the value of what he has offered us, but they emphasize that any editor of a text of an ancient medical author, in whatever language, should first check with the office of the Corpus Medicorum in East Berlin, whose files constitute the most up-to-date and correct list of manuscripts. For all its many merits, the old Diels catalogue is not enough, and it is sad that Professor Ullmann, who by his own researches in Arabic manuscripts has transformed our understanding of the Greek heritage in Islamic medicine, should have failed to note similar developments in the Western tradition. Vivian Nutton Wellcome Institute