The series consists of miscellaneous publications, [1937]-1999, mainly booklets and pamphlets, relating to Welsh affairs or Welsh politics.

The series comprises files of press cuttings, 1990-1995, mainly taken from the Western Mail, relating to Welsh politics, events in Wales and British politics.

Notes by William Floyd on the reign of King John, together with reflections on government, etc.

The group comprises `A Welsh Causerie' cuttings, 1932-1939 (some undated), other cuttings relating to his interests and activities in the fields of antiquities, crafts, culture, folklore, gypsies, politics, preachers, social customs and Welsh nationalism, 1889-1962, and correspondence and scripts relating to radio programmes, 1936-1947.

A collection of 90 letters and one postcard from Rhodri Morgan sent to his family while he was studying at Harvard University. Thanks to a scholarship provided by the Thomas and Elizabeth Williams (Loughor School Board) Fund, Rhodri Morgan was able to study and travel in the USA between 1961 and 1963. Most of the letters were sent from Harvard University, but many were sent from various locations across the USA while Rhodri Morgan was on vacation, studying or working. In the letters he discusses university life, his studies, his budget, his developing political interests and notes various friends and experiences which shaped his political outlook. Prys Morgan's detailed notes on many of these contacts are contained in file 25.

The file includes letters from A. J. Balfour, D. R. Daniel, M. L. Vaughan Davies, Henry Tobit Evans, Richard Griffith ('Carneddog'), A. C. Humphreys-Owen, Glansevern (2), J. Bryn Roberts, J. Herbert Roberts, Lord Clwyd, and Henry Robertson, Pale (3). Some of the letters refer to O. M. Edwards's work as Liberal MP for Merionethshire; they include some constituency correspondence.

The file includes letters from A. W. Wade-Evans, David Lloyd George, John E. Gorst, Ellis Jones Ellis-Griffith, Richard Griffith ('Carneddog'), John M. Howell, Aberaeron (2), D. Brynmor Jones, Leif Jones (2), J. Herbert Lewis, A. C. Humphreys-Owen, Glansevern, Bishop John Owen, Henry W. Primrose, A. Osmond Williams, H. Cernyw Williams, and W. Llewelyn Williams (2). Some of the letters refer to O. M. Edwards's work as Liberal MP for Merionethshire; they include some constituency correspondence.