Correspondence with David Armstrong on causation and the causal theory of knowledge, and associated papers, Oct-Nov. 1987, and on universals and states of affairs, Dec. 1992 Box 8 Unit ID: 56 Date: Dec. 1992
Correspondence with Peter Davson-Galle on existence and ontological pluralism, 1989-1991 Box 8 Unit ID: 55 Date: 1989/1991