About Mary Halloran Mary Halloran is a member of the Historical Section of Global Affairs Canada and is the author of several articles and papers on the official history of the Department of External Affairs. Books by Mary Halloran Le ministère des Affaires extérieures du Canada Volume III : Innovation et adaptation, 1968-1984 by (author) John Hilliker, Mary Halloran & Greg Donaghy Canada's Department of External Affairs, Volume 3 Innovation and Adaptation, 1968-1984 by (author) John Hilliker, Mary Halloran & Greg Donaghy