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Papers of Jean-Baptiste Biot, c 1800-1937, including correspondence and a translation of Biot's Memoir on the Circular Zodiac of Denderah.

Books relating to the foundation of Gresham College, the history of Gresham School, the lives of the professors of Gresham College, the Gresham lectures of Sir John Flamsteed, the Sir Thomas Gresham trusts, the life and times of Sir Thomas Gresham and genealogical memoranda.

Arithmeticae et Astronomicae Auctores Varii: 15th century (possibly 1468) mathematical and astronomical treatises by various authors. Earlier texts written in Italy by one hand; others written by Heinrich Langenstein and Paul of Olmütz (?). Full page diagram of the zodiac on folio 47r.

A notebook dated 1772 bearing the title The Rudiments of Geography and Astronomy, from the Dictates of Sam. Dunn, Teacher of Mathamaticks &c.

'The Right ascension and Polar distance brought to January 1800 of the 2500 Nebulae and Clusters of Stars', printed in the Philosophical Transactions by Sir William Herschel.

Manuscript of a paper 'Astronomical Experiment on the Peak of Tenerife, carried out under the sanction of the Lords Commissioners of the Admiralty. By Professor C. Piazzi Smyth. Communicated by G.B.Airy, Esq., Astronomer Royal' in 'Philosophical Transactions' Volume 148 (1858) pages 465-534. Folder of drawings and watercolours, including tipped-in stereoscopic cards. Received 2 June 1857, read 18 June 1857. Last two pages in the manuscript provide an explanatory account of the photographs, how they were taken and developed, and what materials were used.

Papers of Alfred Percival Maudslay, 1885-1891, relating to the Yucatan peninsula including four notebooks from the Yucatan including some diary entries and observations for positions and notes on excavations, 1886, 1887, 1889 and 1891, and astronomical computations, Yucatan peninsula, 1885.

Papers of Maj Henry Hugh Peter Deasy, including astronomical observations, Lucknow, 1896-1897; route book Baltit to Sinkiang, 1897-1898; meteorological notebook, Sinkiang, 1897-1899 and meteorological notebook with entries by Arnold Pike, Deasy's companion, on journey from Leh to Lanak La, 1896.

Papers of and relating to Percy Fawcett including 'The exploration of the Rio Aquiry', 1906-1907; letters to Reginald Pound, 1923 and to the editor of World Wide Magazine, 1923; report to the Royal Anthropological Institute, London, 15 Nov 1951, on some human remains brought from Brazil by Senor Chateaubriand and thought to be those of P. H. Fawcett; astronomical observations, Bolivia-Peru boundary and Bolivia-Brazil boundary, 1908-1910; 'The new frontier between Bolivia and Peru', 1910 and papers relating to the search for Col Fawcett.

Observation files by Robert Lawrence Reid including two angle books, time book, astronomical observations and barometric readings, Anewimi region, 1905-1909. Journal MSS: 1902, 'Some explorations in Portuguese East Africa'.

Observation file of Capt Temple Leighton Phipson-Wybrants, Mozambique, 1880, comprising many pages of astronomical observations and calculations to establish latitude or logitude; some simple sketch maps of various locations; some references to Mr Coles' 'training instructions in the use of instruments, mapping, etc.'

Papers of Arthur Cowper Raynard, 1881, comprise a letter to Mrs [Sophia] De Morgan, widow of Augustus De Morgan, offering to lend her Professor Edward Singleton Holden's biography Sir William Herschel, his life and works (London, 1881).