About Sean T. Cadigan Sean T. Cadigan is Head of the Department of History at Memorial University of Newfoundland. Books by Sean T. Cadigan Black Ice David Blackwood: Prints of Newfoundland edited by Katharine Lochnan by (artist) David Blackwood by (author) Michael Crummey, Sean T. Cadigan, Martin Feely, Derek H.C. Wilton & Caoimhe ní Shúilleabháin