To provide quantitative estimates of the principal demographic and social characteristics of emigrants to the USA from the UK, and to test the usefulness of the passenger lists of American ports for this purpose. Variables Age, sex, occupation, nationality, type and size of migrating household; type of vessel, class of accomodation, data and port of arrival and departure, destination and place of last residence (where available). Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.