Though the materials for the reigns of Edward VI, Mary, and Elizabeth are very completely known, occasional sidelights may be thrown on this period from minor sources which have hitherto escaped notice. At Oxford, for example, there is a large number of manuscripts which have been little used. It is the object of this paper to give some indication as to their nature and relative importance. An exhaustive account is here impossible. As a rule the manuscripts described are inedited, but references to exceptions are given in the footnotes. At the outset, it must be confessed that the new information disclosed is neither large nor of great intrinsic value, yet nothing which will add to the primary sources of a period is unworthy of notice.