M.A.K. Halliday was born in Yorkshire in 1925. He was trained in Chinese for war service with the British army; studied in China, taught Chinese in Britain for a number of years, then moved into linguistics, becoming in 1965 Professor of General Linguistics at University College London. In 1975 he was appointed Foundation Professor of Linguistics at the University of Sydney, where he remained until his retirement. William S. Greaves is Emeritus Associate Professor in the English Department at Glendon College, York University, Toronto. His co-edited (with James D. Benson) book Functional Dimensions of Ape-Human Discourse will be published in 2004 by Equinox Publishing Ltd.