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Miscellaneous correspondence comprised largely of letters to Nevil Maskelyne.
1. Letter from Israel Lyons Jnr, Cambridge, 1766, containing calculations for the occultations of stars.
2. Letter from John Campbell, East Sheen, Surrey, 15 September 1771, forwarding an account of a solar eclipse of 25 July 1767 observed by Captain Wallis from HMS 'Dolphin' in Port Royal Harbour, King George's Island (Tahiti).
3. Letter from Captain John Wallis, Frithhill, near St Germans, Cornwall, 17 December 1771, regarding the circumstances of the eclipse of 25 July 1767 mentioned in the previous letter.
4. Letter from Robert Fenwick, officer of the Royal Artillery, Barbados, 17 October 1770, containing observations of the stars and Jupiter's satellites to determine the longitude of Barbados.
5. Letter from Lord Sandwich, Hincking Brook, 1 June 1772, requesting attendance at the election of a Professor of Chemistry.
6. Letter from William Marsden, Fort Marlbro., 25 November 1772, giving favourable comments on finding longitudes with a sextant.
7. Letter from Israel Lyons, 22 August 1774, regarding a problem to find instrumental errors using the known right ascensions of stars, and errors in a pendulum at altitudes. An unconnected note, dated 22 August to 28 September 1774, concerning theodolite measurements for the Schiehallion Experiment has been included with the letter.
8. Letter from Gianguiseppe Barzellini, written in Italian, 11 November 1774, communicating his paper 'Altezza di Polo della citta di Gorizia' ('The Altitude of the Pole of the City of Gorizia').
9. Letter from Captain Huddart, 25 March 1780, regarding eclipses of Jupiter's satellites observed at Bombay.
10. Letter from Mrs M. Edwards, Ludlow, Herefordshire, 18 June 1785, concerning the 1795 computations and a request to settle an account.
11. Covering letter for two enclosed papers from Charles Hutton, Woolwich, 27 June 1785, with Maskelyne's calculations written on the letter.
12. Letter from William Wales, 23 March 1786, commenting on the accuracy of some tables.
13. Letter to William Wales from John Harrison, Masham, Yorkshire, 4 May 1787, reporting that he no longer has any record of the observations he made as purser on HMS 'Dolphin' of the eclipse observed from Port Royal, Tahiti, on 25 July 1767.
14. Item number unassigned.
15. Undated letter from Captain Mudge, Amesbury, Wiltshire, requesting material relative to a trigonometrical survey, with some equations by Maskelyne.
16. Letter from H. Parker at the Admiralty, 7 June 1792, regarding John Wood's papers, with calculations by Maskelyne.
17. Invitation from George Gilpin, 18 November 1793, to a Royal Society meeting on 21 November, with various scribbled calculations.
18. Letter from Charles Hutton, Woolwich, 19 December 1793, regarding a dictionary, with various calculations and equations.
19. Letter from William Gooch, Brockdish, Norfolk, 27 April 1794, on the amicable settling of accounts.
20. Invitation to dinner addressed to 'My Dear Tycho' (possibly a familiar name for Maskelyne) from James Stuart Mackenzie, Hill Street, 24 April 1795, with various equations.
21. Note from Mrs Ward, Mayfair, 16 May 1795, giving the address of Mrs James, with criticism of Mayer's logic.
22. Letter from Mr Rowed of the Globe Tavern, Fleet Street, 15 June 1795, regarding the meeting of the 'Club' to be held at Maskelyne's house, with various computations.
23. Letter from Joseph Cawthorne, Greenwich Park, 9 September 1795, regarding an appointment to meet Mr Ward and friends at the Royal Observatory, with algebraic equations on the back.
24. Letter from G. Eckard, 15 December 1795, giving his compliments, with a note on the reverse in Maskelyne's hand on the construction of an optical instrument.
25. Undated note from Dr Layard on the guarantee of supporting Maskelyne's favoured candidate at an election, with various computations.
26. Letter from Charles Hutton, Woolwich, 27 February 1796, concerning Simpson's method for computing series.
27. Letter from George Gilpin, 3 April 1797, giving notice of a Royal Society meeting next Thursday, with various calculations.
28. Letter from George Gilpin, 8 May 1797, giving notice of a Royal Society meeting on 11 May 1797, with various computations.
29. Letter from George Gilpin, 12 March 1798, giving notice of a Royal Society meeting on 15 March 1798, with various computations.
30. Letter from William Wales, Christ's Hospital, 5 June 1798, regarding the examination of papers by the 'Committee', including Sir Joseph Banks.
31. Letter from Thomas Wright, Island of St John, 1 May 1799, regarding ascertaining the boundary in the St Croix river, U.S.A., by means of observing Jupiter's satellites.
32. Letter from William Manwaring, Paddington, 17 December 1799, regarding gifts of a pair of pigeons, some pears and jam, with various scribbled calculations.
33. Letter from George Gilpin, 6 July 1801, giving notice of a Royal Society visitation, with calculations.
34. Note on time-keepers by J. Earnshaw, High Holborn, 30 August 1801, with various additional notes and equations.
35. Letter from Messrs Key and Sons, Abchurch Lane, 15 August 1803, forwarding specimens of paper, with various stellar observations on the reverse of 12 October 1804.
36. Letter from F. Amoros and F. de Gilleman, 'officiers du Ministere de la Guerre', Madrid, 22 August 1803, written in French, reporting observations of a solar eclipse by Ali-Beik Abd-Allah at Tangier.
37. Letter from James Horsburgh, Bombay, 31 May 1804, containing observations of the first and second satellites of Jupiter in 1803.
38. Letter from Julian Canelas, Isle of Leon, 5 October 1806, containing occultations of Antares, March 1805, and the solar eclipse, 16 June 1806.
39. Letter from James Pascoe, Honiton, Devon, 11 October 1806, confirming the accuracy of the French tables, with equations on the ellipsis overleaf.
40. Letter from William Bligh, Governor of New South Wales, Sydney, Australia, 28 January 1807, containing two copies of observations of an eclipse of the Sun.
41. Letter from William Bligh, Governor of New South Wales, Sydney, Australia, 31 October 1807, containing observations of a comet.
42. Letter from Peter and George Dollond, London, 8 October 1807, regarding the despatch of a pocket globe, with a sketch relative to Stephen Groombridge's scheme.
43. Letter from George Dollond, 15 August 1808, London, regarding the specifications of an object-glass for a 6 foot telescope, with various dimensions of convex and concave lenses.
44. Letter from George Dollond, London, 22 August 1808, regarding the thickness of the glass in the 6 foot object glass, with diagrams
45. Letter from George Dollond, London, 13 September 1808, giving answers to enquiries involving the 6 foot telescope.
46. Letter from J. Merdbey, Woolwich, 18 April 1809, paying his respects, with various equations on the reverse.
47. Letter from Stephen Groombridge, 24 April 1809, regarding amendments to a book, with various equations on the reverse.
48. Letter from Maskelyne answering points raised by a pamphlet of John Harrison's and setting out facts to be considered by the Board of Longitude in evaluating Harrison's claim to the second £10,000 of the prize for finding longitude at sea.
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