The collection comprises correspondence, mainly concerning meteorological readings and Daniell's religious beliefs, lecture notebooks and printed pamphlets on meteorology and the battery, certificates of membership of learned societies, and obituaries and biographies of Daniell, 1821-1990. Notably including correspondence between Daniell and friends and colleagues such as Charles Babbage, Lucasian Professor of Mathematics, University of Cambridge, Charles James Blomfield, Bishop of London, Sir Marc Isambard Brunel, engineer, Samuel Taylor Coleridge, poet, Michael Faraday, Joseph Louis Gay-Lussac, chemist, John Frederic William Herschel, astronomer, James Clark Ross, polar navigator, principally concerning meteorology and meteorological instruments, the chemistry of batteries, the publication of Daniell's books and articles, the management of the Royal Society, London, Daniell's religious beliefs, 1821-1857; manuscript copies of lectures delivered by Daniell including at King's College London and the Military School of the East India Company, Addiscombe, Surrey, 1831-1845; printed articles and pamphlets by Daniell or reviews of his work, including On voltaic combinations (London, 1836), reviews of Meteorological essays and observations (London, 1823), 1823-1860; membership certificates of Daniell to various learned societies including National Institute for the Promotion of Science, Washington, US, 1839-1845; obituaries and biographies of Daniell, 1845-1990.

Correspondence and papers of and relating to Frederick Denison Maurice, c1830-1972, including a letter from Maurice to his mother, 1833; the manuscript, c1830-c1834, of Maurice's novel Eustace Conway (published in three volumes, Richard Bentley, London, 1834); ordination certificates and licences to preach, 1834-1871; various pamphlets by Maurice, 1841-1859, including a letter to Samuel Wilberforce on reasons for not joining a party in the church, 1841, one on education, 1847, and a plan for a female college, 1855; five manuscript letters, undated [? 1843], to Sara Coleridge, daughter of Samuel Taylor Coleridge, on religious subjects and bereavement and commenting on her Essay on Rationalism (1843); King's College London correspondence, comprising letters from Maurice, 1841-1853 and undated, pertaining to teaching, students, academic and College matters, including his professorship of Divinity, 1846, and correspondence between Maurice and Richard William Jelf, Principal of King's College London, to be laid before Council, 1853; printed material including copies of the correspondence between Maurice and Jelf, 1853; manuscript letter from Maurice to 'My dear Friends' via Brooke Lambert on leaving King's, 1853; manuscript letter from J[ulius] C Hare to [Derwent] Coleridge (son of Samuel Taylor Coleridge), 1853, concerning a protest against Maurice's expulsion from his theological professorship at King's College; newspapers and news cuttings on Maurice's dismissal by the Council of King's College, 1853; a copy of Maurice's The Doctrine of Sacrifice (1854), inscribed by him; manuscript letter from Charles Kingsley, 1859, soliciting Maurice's help in finding a curate; engraving of Maurice, 1860; manuscript sermon by Maurice on Proverbs c XII v 20, 'Deceit is in the heart ... ', given at St Peter's, Vere Street, [1860s]; copy of Maurice's The Gospel of the Kingdom of Heaven (1864), inscribed to his son J F Maurice. A scrapbook contains two letters from Maurice to Miss Duncan, one dated 1868 and thanking her for a gift; printed obituaries of Maurice, including news cuttings; portraits of Maurice, including a photograph; a printed catalogue of his works; a printed leaflet on the Working Men's College, London, 1872; manuscript notes (not Maurice's) on sermons preached by him; a printed sermon on Maurice by Charles Kingsley, 1873, for an industrial school for girls in Charlotte Street, Portland Place, London (established by Maurice in 1867); manuscript extracts of letters from T[homas] Hughes (the author?) to Maurice. Other printed material comprises articles and sermons on Maurice's death in 1872, and items relating to a dinner held at Lincoln's Inn, 1972, for its centenary. A manuscript letter from Emily Hill to Mrs Shaen, 1872, describes Maurice's death and a manuscript letter from Charles Kingsley to Maurice's widow, 1872, thanks her for a Greek testament. Other memorabilia relate to Maurice, his family, and friends.

Papers of and relating to Evelyn Underhill, 1874-1997 and undated, comprising personal correspondence of and concerning Underhill, 1888-1969 and undated, the correspondents including Baron Friedrich von Hugel (three letters, 1911-1916), Underhill's husband Hubert Stuart Moore (117 letters from Underhill to Moore, 1890-1912 and undated, and 30 letters from Moore to Underhill, 1898-1906 and undated), Rabindranath Tagore (typed transcripts of 10 letters from Underhill to Tagore, 1913-1914), and members of the Underhill family, the subjects ranging from Catholicism, travels in Italy, Switzerland and France, publications and lectures, spiritual matters and advice, mysticism, health, and World War Two; correspondence, 1907-[1954], with various publishers concerning Underhill's publications (some posthumous) and broadcasts, including copyright, costs, sales and royalties; manuscripts and typescripts containing proposed holiday itineraries and recording Underhill's impressions while travelling in Italy, Switzerland and France, 1898-1899, 1901-1907; poetry, 1917-1923 and undated, including some work which was published; a speech at King's College London on being elected a Fellow, 1927; an article on 'The Fountain of Life: an iconographical study', published in 1910; material relating to spiritual development, 1921-1939, mainly under the guidance of Baron Friedrich Von Hugel and including transcripts of his letters, 1921-1924, and other items on spiritual advice, confessions, goals and progress; papers relating to retreats and religious writings, 1924-1932 and undated, including notebooks and texts of addresses; printed material by and concerning Underhill, 1926-1941, 1990, including some of her publications; press cuttings, 1891-1949, mainly reviews of Underhill's work but also including early published pieces; sketchbooks and drawings, 1892-1911 and undated, including sketches and watercolours of marine scenes in Britain, ecclesiastical subjects, and Italian and French architecture; photographs, c1925-c1930s and undated, including a photograph and negatives of Underhill (one at Pleshey), a portrait of Baron Von Hugel, marine views, and views of French and Italian castles and towns; material relating to the Underhill family, 1874-1940, including the marriage certificate of Evelyn Underhill's parents, 1874, a family tree, c1891, a copy of Evelyn Underhill's will, 1940, and details of books in Dr Williams's Library, London, which originated from Underhill's library; obituaries of and articles about Underhill, 1941-1997, including theses, bibliographies, memoirs, biographical material and reflections on her work; newsletters of the Evelyn Underhill Association, 1992-1997.