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.

Sidney George West slide collection, [1934-1937] comprises glass lantern slides depicting images of Portugal. Each slide has been numbered and labelled. They include scenes of Lisbon, Estoril, Cintra, Mafra, Evora, Santarem, Thomar, Coimbra, Luso-Bussaco, Vizeu, Oporto, Braga, Bom Jesus, Viana Do Castelo, Aveiro, Leiria, Batalha and Alcobaça and images of rivers, valleys, religious buildings and traditional scenes including a festival and bullfight. An inventory prepared by West, dated 13 September 1934 - 6 December 1937, is enclosed and gives details of each slide.