First published 1852 Abridged edition first published in Great Britain by Penguin Books 1988 Based on Roget's Thesaurus, revised and edited by Betty Kirkpatrick, first published by Longman Group UK Limited 1987 Revised edition published 2000 New edition, revised and edited by George Davidson, first published 2004 This pocket edition first published 2005 This edition copyright © Longman Group UK Limited, 1962, 1982, 1987. New material in 2000 and 2004 editions © Penguin Books Ltd, 2000, 2004 Set in 6/7 pt PostScript ITC Stone Serif and ITC Stone Sans Typeset by Rowland Phototypesetting Ltd Printed in England by Clays Ltd