This two-part microfilm collection preserves important source material for thorough study of early New England history by bringing to scholars the papers of Cotton and Increase Mather.

Part I consists of Cotton Mather's papers, and includes diaries, sermons and notes on sermons, letters, and essays. In addition, there are recognized tracts and writings, such as "The Examination of George Burrough for Witchcraft" and "Quotidiana," as well as the manuscript bibliography on Mathers compiled by William S. Piper.

Part II of the collection chronologically presents important events in the life of Increase Mather, biographical material, and other valuable information about the Mather family history.