Newcastle University evolved from two colleges founded in the Nineteenth Century as part of the University of Durham, the School of Medicine and Surgery (established in 1834) and Durham College of Science (established in 1871, became Armstrong College in 1904). In 1937, the Newcastle Colleges became King's College and achieved independence from the University of Durham in 1963 when it became the University of Newcastle upon Tyne.The University Archive contains significant material relating to the development of Newcastle University and its predecessors. It includes Annual Reports, Senate and Council minutes and departmental publications covering many subjects.

The papers of the distinguished public servant Lady Plowden (1910-2000) were generously gifted to Newcastle University Library in 2003 by the Plowden family.

Held in Special Collections, Lady Plowden's papers are an extensive and rich resource reflecting her many areas of concern. Lady Plowden held a number of high-profile public roles in the spheres of education reform and television broadcasting, most notably as Chairman of the Central Advisory Council for Education (England), 1963 – 1967, Vice-Chairman of the BBC Board of Governors, 1970 – 1975, and Chairman of the Independent Broadcasting Authority (IBA), 1975 – 1980. A large and varied number of public roles followed, many of which retained this focus on primary and pre-school education reform as well as the promotion of high-quality television broadcasting. Lady Plowden's interests were wide however and these papers also reflect Lady Plowden's roles within organisations related to Romany and Traveller education and rights, adult education, the care and resettlement of offenders, the role of voluntary work, young adult unemployment and training, and women and employment.

Lady Plowden (nee Richmond) was a niece of Gertrude Bell and a cousin of the Trevelyans of Wallington. An additional deposit of material made by the Plowden family comprise of a number of family photograph albums and correspondence files relating to the Richmond, Bell and Trevelyan families.

The archive mainly comprises correspondence relating to Charles' activities as a Civil Servant and administrator. There are also publications relating to these activities and Charles' wider interests.

There is also personal content, including travel diaries, family correspondence and papers regarding inheritance of the Wallington estate in Northumberland.

This archive includes content accumulated and created by both Charles and Mary, and other family members. It reflects the family's personal activities from Charles' childhood in the 1870s to Mary's death in 1966, but also includes some content from Charles' professional life. It can support research into a broad variety of areas, including political history (particularly the Liberal and Labour parties, socialism and international relations), World War I (particularly dissent and the peace movement), childhood and education (from both a personal and political perspective), domesticity, class and landed estates.
This extensive personal archive is mostly comprised of correspondence. This includes: Correspondence to Charles in his role as MP Correspondence to and from Charles relating to the operation of the Union of Democratic Control Correspondence to and from Charles relating to his positions in government Correspondence relating to the management of the Wallington estate and the donation to the National Trust Correspondence between members of the Trevelyan and Bell families, much of which is domestic in tone Correspondence to and from Charles and Mary's children from their early childhood to adulthood Correspondence from visits abroad including North America, Australia, New Zealand, the Middle East, Russia and Germany The correspondents include family members such as Charles' brothers George Macaulay Trevelyan and Robert Calverley Trevelyan, Mary's sister and brother in law Elsa Richmond and Admiral Sir Herbert William Richmond. Other correspondents include Sir Winston Churchill, J Ramsay MacDonald, E D Morel, Arthur Ponsonby, Walter Runciman, Herbert Samuel, George Bernard Shaw and Jennie Lee.

Other documents include: Papers relating to Charles, Mary and their childrens' educations, including exam papers and school ephemera Personal Diaries, in particular a short run of Mary's personal diaries as a young woman Official political papers, including Cabinet Conclusions, draft bills[?] and copies of Hansard Pamphlets and leaflets written by and collected by Charles, many relating to socialism and the UDC Transcripts of speeches given by Charles and Mary in professional and personal capacities Personal notebooks with draft speeches and essays Family photograph albums and glass negatives, recording family events, daily life, and Charles' political career Press cuttings and scrapbooks relating to family events and Charles' career