Peter Anstey is Director of the Western Civilisation Program at the Australian Catholic University. He specialises in early modern philosophy with a focus on individual philosophers such as Locke and Boyle as well as broader themes such as experimental philosophy. He was a student of David Armstrong and is Armstrong's Literary Executor. A.R.J. Fisher is Assistant Professor of Philosophy at Gonzaga University. He works on analytic metaphysics, especially the metaphysics of properties, time, and modality. He also specialises in the history of analytic philosophy, with an interest in the history of metaphysics in the twentieth century. He has spent several years working closely on Lewis' archive.