This book makes available five classic studies of the organisation of behaviour in face-to-face interaction. It includes Adam Kendon's well-known study of gaze-direction in interaction, his study of greetings, of the interactional functions of facial expression and of the spatial organisation of naturally occurring interaction, as recorded by means of film or videotape. They represent some of the best work undertaken within the 'natural history' tradition of interaction studies, as originally formulated in the work of Bateson, Birdwhistell and Goffman. Chapter 2, written especially for this new book, provides an historical and theoretical discussion of this tradition, and a new final chapter takes up the theme of the organisation of attention in interaction. The introduction provides details of the circumstances of how each paper came to be written. Each of the papers reprinted is accompanied by a short postscript, placing the work in the context of more recent research. Several of the papers presented in this volume, although widely referred to, have long been difficult to obtain. Their republication will be warmly welcomed by all students and teachers who are concerned with face-to-face interaction.