This title is part of a series based on the work of the University of Hertfordshire Historical Resources Project which with the help of local historians and genealogists has computerized the records for the 167,298 individuals recorded as living in Hertfordshire in the 1851 Census. Key areas of historical research are addressed, such as the extent of female and child employment, the effects of this upon the integrity of the family, the contribution of cottage industry to regional economic development, the relationship between occupational structure and demographic variables, such as sex ration and age at marriage. This first volume in the 12 volume series covers the parishes of Aldbury, Great Berkhamstead Superintendent Registrar's District in 1851, the westward spur of the county of Hertfordshire with a population of 11,578 individuals. Part One presents an historical analysis of the census including population, age and marital structure, the regional economy, straw plaiting, the employment of women and children, agriculture, farm sizes and labour force, patterns of migration, and family structure. Part Two contains the census returns themselves. This data provides opportunities for further historical analysis, some insights into the circumstances of particular individuals and their families, and should be of interest to both the family historian and genealogist. The book is also appropriate for National Curriculum secondary school studies in local history.