 In particular, a notion of "geometric transformation of points to spaces" gives a natural fibrewise treatment of topological bundles.A recent project of his has been to connect this with the topos approaches to physics as developed by Chris Isham and others (see Doering and Isham's "What is a Thing?Topos Theory in the Foundations of Physics") at Imperial College, and Klaas Landsman's group at Radboud University Nijmegen (see Heunen, Landsman and Spitters' "A Topos for Algebraic Quantum Theory").