Nicholas Griffin is Director of the Bertrand Russell Centre at McMaster University, Hamilton, Ontario, Canada, where he holds a Canada Research Chair in Philosophy. He has written widely on Russell, is the author of Russell's Idealist Apprenticeship and the general editor of The Collected Papers of Bertrand Russell.
Bernard Linsky is Professor of Philosophy at the University of Alberta, Canada. He is the author of Russell's Metaphysical Logic and The Evolution of Principia Mathematica: Russell's Manuscripts and Notes for the Second Edition and editor (with Guido Imaguire) of On Denoting: 1905-2005.