In over ten years of Domesday studies, I have incurred more debts of gratitude than I can possibly note here. However, my explicit thanks must go to Mr A. Hibbert of King's College Cambridge, who first introduced me to mediaeval studies; to Professor G. H. Martin who supervised the present work in its early stages and Dr A. Newman who took over from him; to Christine Mahany of the Trust for Lincolnshire Archaeology for an education in archaeology and many years of advice and friendship; and to Professor John Wacher, chairman of the Trust, for his unstinting encouragement and support. The analysis of the borough of Nottingham and much of the research on the county was undertaken under the auspices of Nottingham Museums' Domesday 900 Project, and thanks are therefore due to Nottingham City Council and Nottinghamshire County Council who jointly provided six months of funding, and in particular to Graham Black of the Castle Museum who co-ordinated the project. Little of this work, however, would have been possible without the help and advice of C. S. B. Young of the Field Archaeology Section who generously put at my disposal the results of his archaeological research in advance of publication; and of S. N. Mastoris whose deep knowledge and under-standing of Nottingham lie behind much of what I have to say. To both I am grateful for many hours of learned discussion on all aspects of pre-Conquest England; without their considerable knowledge and insight into mediaeval history and archaeology, this work would be the poorer. In addition to the above, many people have read the present work, in whole or part, at various stages in its production, and I would like to thank all those who have commented upon it. In particular I am indebted to M. W. Bishop, Nottinghamshire County Archaeologist, for his comments on settlement structure; to T. Cain for excursions into the by-ways of tenth-century politics; to A. Cameron, formerly Keeper of Manuscripts, University of Nottingham, for his views on tolls and burghal territories; to Dr P. Dixon, Department of Archaeology, University of Nottingham, for discussion of the putative early borough at Tickhill; to C. Drage, field officer, the Trent and Peak Archaeological Trust, for information on his sites in Newark in advance of publication and for discussion of the early history of Nottinghamshire and Derbyshire; to Dr T. Foulds for advice on the dating of Nottingham charters, and for the resolution of a number of thorny genealogical conundra; and to Dr H. Fox, Department of Local History, University of Leicester, for his invaluable advice on the form of the present work, and for detailed criticism of chapters 1 to 5, and 9. Needless to say, all those errors of commission or omission that remain are entirely my own responsibility. Like Domesday Book itself, if somewhat more mundanely, this thesis has been through a number of recensions, and I would like to thank the staff of the University Library, Nottingham, of the University Library, Leicester, and of the Nottinghamshire Record Office, for their untiring assistance in the course of the research; and Sheila Prince, Anne Mace, Barbara Smith, Lynne Mastoris, and Charles Wyndham for typing drafts at various stages. I am also grateful to Jane Goddard for drawing figure 11; to Charles Young for permission to reproduce figure 19, and Steph Mastoris for figure 16; and the University Library, Nottingham, for producing figures 2 and 15. Finally, I have to thank my parents for their support and encouragement over many years; my parents-in-law GŁnter and Marlis Maack, for providing a quiet retreat while writing the first draft; and, above all, my wife Christine for ministering to a frequently fevered brow.