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Various calculations by Thomas Henderson divided into two sets: (1) Corrections of declination, May 1832 - March 1833; and (2) Corrections of right ascension, April 1832 - January 1833.

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Thomas Henderson's comparisons of chronometers with the transit clock. There are also observations of Encke's Comet, times of flash of the evening gun, and weather observations.

Scope and Contents Miscellaneous correspondence, notes and computations in sixteen sections:(1) (i) Lists of papers; (ii) a note on the transmission of papers to R. Sheepshanks; (iii) a list of papers belonging to F. Fallows, written by Samuel Johnson, 20 June 1835; and (iv) a letter to G.B. Airy from T. Henderson regarding the reduction of Fallows's observations.(2) Correspondence with G.B. Airy, 12 December 1845 - 29 October 1849, regarding the printing and reduction of F. Fallows's...

Scope and Contents Correspondence of F. Fallows and S. Henderson during their respective periods as Cape Astronomer. The letters deal mainly with the initial establishment of the Observatory, its daily running, instructions from the Lords Commissioners on work to be conducted, and information on the provision of instruments. The correspondence includes the following items:A letter from the Lords Commissioners appointing Fallows as Cape Astronomer, 26 October 1820.A letter from T. Young,...

Scope and Contents Correspondence between T. Henderson, G.B. Airy and T. Maclear, comprising a letter from Henderson aboard H.M.S. 'Melville', 25 January 1832; a letter from Henderson concerning tables of corrections for the microscopes on the mural circle, 27 September 1833; a list of observations with the transit circle, 10 April 1832 - 24 May 1833, and the mural circle, 16 May 1832 - 24 May 1833, with a list of corrections to mural circle microscope readings, dated 27 September 1833; a memorandum by...

Scope and Contents Correspondence regarding different aspects of the Cape Observatory, divided into four sections:Correspondence between the Admiralty, E.J. Stone and G.B. Airy, 20 July 1870 - 2 April 1875, including draft instructions defining Stone's duties at the Cape, details of how he found the Observatory to be on his arrival, and details of the memorial to Mr Mann, with regular reports on work being carried out.Correspondence regarding the appointment of an assistant at the Cape...

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Sent from Francis Beaufort to John Pond.

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Sent by A.B. Becher to John Pond.

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About forwarding a paper on occultations and longitude.

Scope and Contents Concerning astronomical observations and calculations; Sir John Herschel's pendulum; clocks; triangulation; the exact position of the Cape Observatory; the payment of workmen; Dolland's calculations; the whereabouts of a quadrant sent to England by Mr Lloyd; the usefulness of a general table of constants; Mrs Fallows's remarriage; and the subscription to put up an iron railing to commemorate Fearon Fallows. People mentioned include Sir John Franklin, Sir John Herschel, G. Dollond, the Prince...

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Concerning a proposed visit of the Revd Adamson to Sir John Herschel; Maclear's continuing work on the Abbe de Lacaille; stellar observations; and the erection of an obelisk in honour of Sir John Herschel. People mentioned include the Revd Adamson, Sir John Herschel, the Abbe de Lacaille, J.D. Forbes and T. Henderson.

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Concerning Baily's 'Life of Flamsteed'; the arrangement of constellations in the southern hemisphere; the measurement of stellar magnitudes; the calculation of right ascension and declination without errors; and observations of Halley's Comet from 24 January 1836 onwards. The people mentioned include Sir John Herschel, T. Henderson and Captain Beaufort.

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Correspondence comprised predominantly of letters from T. Maclear or F. Fallows to F. Baily:

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An undated microfilm made by the Public Record Office of correspondence of the Royal Observatory, Cape of Good Hope: RGO 15/27, correspondence of Fearon Fallows and Thomas Henderson, 1820-1833, and RGO 15/30, correspondence of Henderson, G.B. Airy and Thomas Maclear, 1832-1842.

Scope and Contents

Various observations and calculations by Thomas Henderson, including a table for approximate parallaxes in right ascension and declination, observations of Encke's Comet, a table for reducing transit observations, and stars to be observed with the transit circle.