William Diver, Ph.D. (1953) in Linguistics, Columbia University, was Professor of Linguistics at Columbia University and the intellectual founder of the Columbia School of Linguistics. He was Professor Emeritus until his death in 1995.Alan Huffman, Ph.D. (1985) in Linguistics, Columbia University, is Professor of Linguistics and English in The City University of New York. He is the author of The Categories of Grammar: French lui and le (John Benjamins, 1997), and many articles on Columbia School linguistics.Joseph Davis, Ph.D. (1992) in Linguistics, Columbia University, is Associate Professor of Linguistics in the School of Education, The City College of New York. He was co-editor of Advances in Functional Linguistics: Columbia School Beyond its Origins (John Benjamins, 2006).