Description: Papers of Mary-Elizabeth Hamstrom (1927-2009), professor of Mathematics (1961-1999), contain publications, research notes and notebooks, course material, proofs, theorems, and correspondence concerning the American Mathematical Society's Summer Institute on Set Theoretic Topology, the University of Illinois Math Department, biographical material and publications of mathematician R. L. Moore, and files concerning Hamstrom's research interests in knot theory, point set and the spaces of homeomorphism of manifolds in geometric topology.