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>. Schools. Number of schools, 1818-1867; Monmouthshire, 1600-1870; and work schools, 1700-1890 Schools. Church of England elementary schools under government inspection, 1850-1862; British schools, total and inspected, Wales and South Wales, 1843-1871 Schools. Type of school, 1877-1976 Schools, by responsible body, 1879-1971 Pupils. Number of pupils in day and Sunday schools, 1818-1867 Pupils. Number on register, by type of school, 1877-1976 Pupils. Number of pupils in maintained schools, by sex, 1898-1976 School leavers by age of leaving a) from public and elementary schools, 1920-1938; b) from secondary schools on the grant list, 1909-1938; and c) school leavers, by sex and reason, 1947-1974 Teachers. Number of full-time teachers, by type of school, 1851-1973 Teachers. Full-time teachers, by qualification, 1851-1973 Teachers. Teachers in training, 1865-1974 Finance. Total net expenditure on elementary education, 1951-1975 Examinations. Number of candidates and passes, Central Welsh Board 1900-1950; and Welsh Joint Education Committee 1951-1974 University. Number of full-time degree and diploma students, by college and sex, 1893-1972 University. Origin of full-time degree students of the University of Wales, 1921-1975 University. Staff of the University of Wales, by grade, 1908-1974 University. Finance. Total current income and expenditure by institution, University of Wales, 1893-1974 Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.