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Barry Blake retired from the position of Foundation Professor of Linguistics at La Trobe University, Melbourne, in 2003. He is the co-author of Language Typology (1981) and author of Australian Aboriginal Grammar (1987), Relational Grammar (1990), Case (1994, 2001) and several books on various Australian languages. Most of his past research has been in comparative and historical linguistics, but he is currently researching the functions of language that lie beyond the direct exchange of information, in particular humour and oblique, obscure and secret language.