Correspondence, notes, sermons, lectures, teaching materials, and memorabilia of Noah Porter. The major part of the correspondence, as well as of the other papers, deals with Porter's responsibilities as professor and president at Yale College. The few family letters are from his father, Rev. Noah Porter of Farmington, and from his wife, Mary Taylor Porter. His writings include lectures and sermons delivered at Yale College, 1871-1886. Also documenting his academic career are grade books, reports of Yale College committees, including one on the location of college buildings (1866), and papers relating to the American Education Society (1874-1889).