Series XV: contains lecture notes taken by Jonathan Liebowtiz (Columbia College BA 1961) when he was an undergraduate student, mostly from his Junior and Senior years. Classes were taken with such notable professors as James Shenton, C. Wright Mill, Milton Smith, F.W. Dupee, Walter Metzger and Ernest Nagel. Notebooks usually contain the notes from just one course, though sometimes a two-part course is found in one notebook (e.g. Compartive Literarture 19-20). Note that fall semester classes started in September of a year and finished in January of the following year.