The papers and photographs of Gertrude Bell mainly consist of the letters Gertrude Bell sent home to her family whilst on her travels, of the diaries she kept when abroad, and the photographs taken whilst she was away.

The papers consists of sixteen thousand letters, sixteen diaries, seven notebooks and forty-four packets of miscellaneous material; whilst the photographic collection is about 7000 in number, and consists of photographs taken by her between c.1900-1918. Those of Middle Eastern archaeological sites are of great value because they record structures which have since been eroded or, in some cases, have disappeared altogether, while those of the desert tribes are of considerable anthropological and ethnographical interest.

Her competence as a field archaeologist and photographer means that the papers are indispensable for archaeological research of parts of the Middle East.

The items in the Bell Miscellaneous Papers contain material relating to Bell's work and travels, including contemporary articles, notes by Bell on various topics (archaeological sites, Arab tribes, etc.), letters concerning the publication of Bell's letters by Lady Richmond and letters to and from Gertrude Bell, maps and plans, literary manuscripts, lecture notes and copies of letters from Gertrude Bell held elsewhere. There is also a series of the letters known as the Doughty-Wylie letters, 1913-1915. These are the letters between Gertrude Bell and Charles Doughty-Wylie, an army officer with whom Bell was in love. The letters were returned to Gertrude Bell after his death at Gallipoli in 1915.

Books on Arabic and Persian languages, and on the history and antiquities of Arabia, Iraq and the Near East that formed part of Gertrude Bell's working library.

The Cowen Tracts are almost two thousand pamphlets which were formerly owned by local (radical) M.P., Joseph Cowen (1829-1900). The tracts date mostly from the mid- to late-Nineteenth Century and reflect Cowen's interest in the social, educational, political and economic issues of the day.

There is some earlier material, such as Deed of incorporation for the insurance of ships printed by T. Angus, St. Nicholas' Church-Yard, Newcastle (1778). Pamphlets were an effective form of public debate because they could be circulated to a wider audience than books and authors could remain anonymous. The Cowen Tracts discuss Irish politics, foreign policy, women's rights, religion, education and public health and include such titles as The Union programme for 1880: constructive, not destructive, Irish legislation [1879?], Are women fit for politics?: are politics fit for women [185-] and The education of the agricultural labourer: a paper read before the Morpeth Chamber of Agriculture, on Wednesday, Feb. 2, 1870 by M.W. Ridley (1870).

The Grey Tracts reflect the interests of their former owner, the 2nd Earl Grey (1764-1845) whose Whig government was responsible for the 1832 Reform Act, 1833 Factory Act and the 1834 Poor Law Amendment Act. The pamphlets cover a broad range of historical, social and economic subjects including colonial policy, public finance and banking, the Corn Laws and agriculture, poor relief, slavery, Catholicism, Ireland and the Greek Revolution.

With three early twentieth century exceptions, the Indian Tracts is a collection of nineteenth century pamphlets on a range of Indian subjects, such as local self-government, the Indian Civil Service, education, politics, economics, transport, the trade of opium, religion and war.

The Pollard Collection was brought together by Mr Eric Pollard and was purchased from the family with support from the Friends of the University Library in 2011. It focuses on the author, Rudyard Kipling (1865-1936) being particularly rich in early editions of his works. The collection includes a series of short stories, published as 'The Railway Library', which made Kipling's name as a writer in India, England and America. There are also many of his classic novels and works of children's literature such as Puck of Pook's Hill. During the First World War, Kipling devoted his writing to the war effort and this is represented in the collection too. Besides printed books the Pollard Collection includes cuttings and ephemera relating to Kipling as well as 16 colour folio plates by the artists Maurice and Edward Detmold, produced to illustrate the 1908 Macmillan octavo edition of The Jungle Book.

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.