I wish to take this opportunity of expressing my thanks to the Beaverbrook Foundation, the American Philosophical Society and the Canada Council for their financial support of this research; to Principal G. H. Davies and Dr G. Pearce of Regent's Park College for their guidance during the early stages of the investigation; to Professor G. D. Kilpatrick, the Rev. D. E. Whiteley and Professor A. R. C. Leaney for their comments on an earlier draft (my thesis); to Professor C. F. D. Moule and Dr Colin Hemer for their helpful advice in preparing the manuscript for publication; to Dr M. R. Cherry and Dr A. J. Langley of Acadia Divinity College for their encouragement and to the college itself for granting me a sabbatical to complete my revision and prepare the manuscript for publication; and to St Deiniol's Library, Hawarden and Tyndale House, Cambridge for the use of their research facilities. I cannot sufficiently express my gratitude to Dr G. B. Caird, Principal of Mansfield College, Oxford, whose acute and constructive criticism of my work was invaluable; I am also grateful for the editorial suggestions of Professors Matthew Black and Robert Wilson of St Andrews University, Scotland. Above all I owe a debt of gratitude to my family, both English and Canadian, for their interest and concern and to Eugenie my wife, whose love and patience have sustained me throughout the preparation of this book.