Feminist author Carolyn Heilbrun, professor of English literature at Columbia University, lectured on "Marriage: The Modern Discovery."   The first woman to be tenured in Columbia’s English department, Heilbrun complemented feminist landmarks such as Toward a Recognition of Androgyny (1973) and Reinventing Womanhood (1979) with ten mystery novels published under the pseudonym Amanda Cross and featuring sleuth Kate Fansler.