This machine-readable version of John Williams' <i>Digest of Welsh Historical Statistics</i> is the result of a collaboration between the Statistical Directorate of the National Assembly for Wales, the History Data Service and the Centre for Data Digitisation and Analysis at Queen's University Belfast. John Williams' <i>Digest of Welsh Historical Statistics</i> is intended to provide a service for those working on the history of modern Wales. It arises from a belief that the quantitative element is a necessary and important part of the historical record; from an awareness that it was an aspect that was particularly inaccessible for scholars of Welsh history; and from a conviction that some encouragement in the use of quantitative material was necessary. It is modelled on the two volumes dedicated to British historical statistics: Mitchell, B.R. and Deane, P. (1962) <i>Abstract of British historical statistics</i> and Mitchell, B.R. and Jones, H.G. (1971) <i>Second abstract of British historical statistics</i>. Coal. Percentage changes in wage rates of miners, South Wales, 1848-1939. Coal. Average earnings, 1840-1974 Agriculture. Nominal weekly wages 1788-1882; average weekly earnings by county 1867-1917; minimum rates by county 1918-1939; weekly earnings and hours 1967-1957. Police. Maximum and minimum rates of pay of police constables by county, 1902-1914. Building. Hours and rates per hour in the building trade, main towns, 186-1914 and 1936. Engineering and ship-repairing. Rates for different trades, main ports, 1873-1968. Rates of pay and hours for printing trades, main towns, 1850-1968; and for cabinet makers 1901-1914. Average weekly and hourly earnings, and average hours for manual workers over 20 in manufacturing, all industries an d selected individual industries, 1960-1975. Household income and expenditure, Wales and UK, 1953-1954 and 1961-1973. Proportion of households possessing certain amenities, Wales and UK, 1964-1973. Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.