Mistakes in Contract Law

Mistakes in Contract Law

(A) MacMillan Prelims 22/12/09 13:28 Page i MISTAKES IN CONTRACT LAW It is a matter of some difficulty for the English lawyer to predict the effect of a misapprehension upon the formation of a contract. The common law doctrine of mistake is a confused one, with contradictory theoretical underpinnings and seemingly irreconcilable cases. This book explains the common law doctrine through an examination of the historical development of the doctrine in English law. Beginning with an overview of contractual mistakes in Roman law, the book examines how theories of mistake were received at various points into English contract law from Roman and civil law sources. These transplants, made for prag- matic rather than principled reasons, combined in an uneasy manner with the pre- existing English contract law. The book also examines the substantive changes brought about in contractual mistake by the Judicature Act 1873 and the fusion of law and equity. Through its historical examination of mistake in contract law, the book provides not only insights into the nature of innovation and continuity within the common law but also the fate of legal transplants. (A) MacMillan Prelims 22/12/09 13:28 Page ii (A) MacMillan Prelims 22/12/09 13:28 Page iii Mistakes in Contract Law Catharine MacMillan OXFORD AND PORTLAND, OREGON 2010 (A) MacMillan Prelims 22/12/09 13:28 Page iv Published in North America (US and Canada) by Hart Publishing c/o International Specialized Book Services 920 NE 58th Avenue, Suite 300 Portland, OR 97213-3786 USA Tel: +1 503 287 3093 or toll-free: (1) 800 944 6190 Fax: +1 503 280 8832 E-mail: [email protected] Website: http://www.isbs.com © Catharine MacMillan 2010 Catharine MacMillan has asserted her right under the Copyright, Designs and Patents Act 1988, to be identified as the author of this work. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without the prior permission of Hart Publishing, or as expressly permitted by law or under the terms agreed with the appropriate reprographic rights organisation. Enquiries concerning reproduction which may not be covered by the above should be addressed to Hart Publishing at the address below. Hart Publishing Ltd, 16C Worcester Place, Oxford, OX1 2JW Telephone: +44 (0)1865 517530 Fax: +44 (0)1865 510710 E-mail: [email protected] Website: http://www.hartpub.co.uk British Library Cataloguing in Publication Data Data Available ISBN: 978-1-84113-507-6 Typeset by Hope Services, Abingdon Printed and bound in Great Britain by CPI Antony Rowe Ltd, Chippenham, Wiltshire (A) MacMillan Prelims 22/12/09 13:28 Page v Dedicated to my mother, Mavis, and in memory of my father, Ian v (A) MacMillan Prelims 22/12/09 13:28 Page vi (A) MacMillan Prelims 22/12/09 13:28 Page vii PREFACE This book is a biography of an idea. It addresses the question of how English con- tract law came to contain the doctrine of mistake that it does. This is a matter of not only antiquarian interest but also current concern. I hope that I have addressed the question in such a way as to not only provide some insight into the development of the modern law of contract but also to provide a basis upon which others can undertake a reform of the law in this area. How to explain mistakes in contract law? I have argued that the English doctrine of contractual mistake is itself a mistake. The doctrine arose as a result of the efforts of the scientific treatise writers of the late-nineteenth century who bor- rowed civilian inspired forms of mistake. They blended these theories of mistake with those cases in which courts of equity had provided relief where a mistake had occurred. As the common law slowly moved towards an unwitting acceptance of sorts of the theories of mistake proposed by the treatise writers, little concern was given as to how this new doctrine would fit within the existing structure of the common law of contract. Further mistakes were made at this point in the forma- tion of the law. When mistake was given recognition by the House of Lords in Bell v Lever Brothers, it was thought of as forms of mistake which either negatived or nullified consent. The area has been one which has presented conceptual and prac- tical problems ever since; yet another mistake. For all of these reasons, the doctrine of contractual mistake is best thought of as a series of ‘mistakes in contract law’. I have incurred many debts of gratitude in preparing this work and I am delighted to be able to thank the people and institutions who have helped me. I first discussed how best to approach the problem of mistake in contract law with my friend, the late John Yelland. His comments and insights led me to think of a project with an historical approach; I think he would have found the final result interesting. Many other colleagues gave me helpful comments and support at var- ious points in the preparation of this work: Victor Tunkel, Stephen Waddams, Ian Yeats, Margot Horspool and Wayne Morrison. JoAnne Sweeny has helped me to tidy up certain of the chapters. Jo Murkens provided me not only with invaluable translations into English of various parts of Savigny’s System of Modern Roman Law but also with his insights into Savigny’s scholarship. Andrew Lewis kindly read a draft chapter on Roman law and gently corrected more than one error. I am particularly grateful to Michael Lobban who has not only listened to more than one tentative hypothesis but has also read several draft chapters and commented thoroughly upon them. My tutorial students have rendered invaluable assistance in commenting on various arguments. I have also benefitted from the comments given by audience members following the presentation of mistake papers at the vii (A) MacMillan Prelims 22/12/09 13:28 Page viii Preface Current Legal Issues Session (University College London, 2002), the Society of Legal Scholars Conference (Oxford, 2003), the Second Biennial Conference on the Law of Obligations (Melbourne, 2004), and the Institute for Advanced Legal Studies (London, 2007). All remaining mistakes in this work are my responsibility alone. A number of institutions and libraries have greatly assisted me with searches. I would like to thank Unilever for allowing me access to their historical archives and for the assistance of their staff, the staff at the Parliamentary Archives for their help and also the staff at the Beckenham Public Library and the archives at Kingston upon Thames. I am particularly grateful to the librarians at the Institute for Advanced Legal Studies library for their help and their unfailing assistance in retrieving volume after volume for me. Last, but by no means least, I must thank my family for their patience, under- standing and encouragement as this work was prepared. My family has, so to speak, had to live with the mistakes of others for some time. My initial suspicion that this research had formed a part of family life when my daughter Margaret wrote a school assignment on the topic ‘what I did on my holidays’ by explaining that she had spent them looking for Mr Bell was confirmed when my son Henry, having been asked to prepare a project on his local neighbourhood, explained (having spent a week in Beckenham researching war damage) where the bombs had landed in our neighbourhood during the war and the ensuing shortage of housing. I dedicate this book to my mother and in memory of my father. Without their optimism and support none of this would have been possible. Catharine MacMillan London December 2009 viii (A) MacMillan Prelims 22/12/09 13:28 Page ix CONTENTS Preface vii Table of Cases xiii Table of Statutes xxv 1. Introduction 1 2. Contractual Mistake in Roman Law: From Justinian to the Natural Lawyers 10 The Law of the Romans 10 Roman Contract Law 12 Roman Contract Law and Mistake 14 Mistakes as to the Identity of a Contracting party: Error in persona 17 Mistakes as to the Price to be Paid: Error in pretio 17 Mistakes as to the Subject Matter of the Contract 18 Medieval Roman Law 26 3. Contractual Mistake in English Law: Mistake in Equity before 1875 38 The Jurisdiction and Procedures of Chancery 39 Reasons for the Intervention of Equity 44 An Unconscientious Advantage Obtained by Mistake 45 Agreement did not Conform to Parties’ Intentions 45 Instances Short of Fraud 47 Protection of a Weaker Party 47 The Limits of Equitable Intervention 48 Forms of Equitable Relief for Mistake 53 Rectification 54 Specific Performance 56 Rescission 61 Conclusions 68 4. The Lack of Contractual Mistake at Common Law and the Nineteenth-century Transformation of Procedure 69 Pleading 71 Equitable Defences 82 Evidence and the Pre-trial Discovery of Facts 86 Pre-trial Discovery 86 Witnesses 89 Matters of Law rather than Fact 91 Conclusions 94 ix (A) MacMillan Prelims 22/12/09 13:28 Page x Contents 5. Pothier and the Development of Mistake in English Contract Law 96 Pothier and the Traité des Obligations 96 Pothier and English Contract Law 104 Early Contract Treatise Writers 106 Colebrooke and Contract Law 107 Macpherson and the Indian Contract Act 1872 108 Leake: The First Scientific Treatise Writer of Contract Law 112 Judah Benjamin—The Living Transplant 123 Conclusions 133 6. Von Savigny and the Development of Mistake in English Contract Law 136 Von Savigny and German Legal Development 136 Von Savigny and Contract 140 Von Savigny and Mistake 141 Sir Frederick Pollock 143 Pollock’s Principles of Contract 145 Pollock as Will Theorist 148 Pollock and Mistake 150 The Changes in Pollock’s Principles 162 Sir William Anson and the Principles of the English Law of Contract 169 Anson and Mistake 171 Anson Modifies his Treatment of Mistake 174 Conclusions 178 7.

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