The author wishes to express his grateful appreciation to BRANDER MATTHEWS and HATCHER HUGHES, to PROFESSOR FREDERICK H. KOCH of the University of North Carolina, to PROFESSOR FRANKLIN T. BAKER, PROFESSOR ALLAN ABBOT, and PROFESSOR AZUBAH J. LATHAM of Teachers College, Columbia University, to JOHN MULHOLLAND, R. P. BAKER, and CHARLES BERNSTEIN, and to his many students and coworkers in the fascinating field of play production.