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Computer output and program files for the tests of building up errors in numerical integration, representing the results of investigations carried out by G.A. Wilkins in 1955 using National Accounting Machines and the I.C.T. 1201 Computer.

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A letter from G.W. Bothwell, 7 October 1970, enclosing copies of his correspondence with G.A. Wilkins, H.M. Nautical Almanac Office, 9 September 1970 and 2 October 1970, regarding the Anglo-Australian Telescope Computer algoritH.M.S..

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Three letters from G.A. Wilkins, N.A.O., regarding refereeing and reviewing.

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Correspondence with C. Frederick Peters, Jet Propulsion Laboratory, Pasadena, regarding the eclipses of the satellites of Saturn. There is also a letter from G.A. Wilkins to Peters, 25 April 1974, copied to Porter.

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Personal correspondence of G.A. Wilkins with the Royal Astronomical Society and related papers.

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General correspondence with the United States Naval Observatory, including letters on the exchange of data, and related papers. The last folder contains G.A. Wilkins's rough notes on discussions with R.L. Duncombe of the U.S.N.O. and others at Washington and Herstmonceux, 1965-1971.

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Fortrain subroutines for the ICT 1900 series computer by G.A. Wilkins and others.

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Nos 101-356 of the NAO Journal Reprint Series, comprised of typescripts, photocopies and printed items. The principal authors are D.H. Sadler, J.G. Porter and G.A. Wilkins. The dates the reprints were made is not known.

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Notes on the I.C.T. 1201 Computer by G.A. Wilkins and related papers, including a spare set of N.A.O. Computer Circulars regarding the computer; spare copies of the introductory chapters to the handbook; and notes on programs, routines and subroutines for general use.

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Notes by G.A. Wilkins for various International Astronomical Union meetings.

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Notes by G.A. Wilkins on ACRs and LRBs.

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Notes by G.A. Wilkins on the use of machines, including the National Machines, I.B.M. Card-Controlled Typewriter 870 System and Hollerith Machine.

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Two notes from D.H. Sadler to G.A. Wilkins regarding numerical integration.

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Notes by G.A. Wilkins relating to scrutiny of Royal Greenwich Observatory Annual Reports.

Scope and Contents Papers relating to D.H. Sadler's miscellaneous investigations, including, among other items, 'Astrometric Ephemeris of Pluto'; a note on the use of the equinox for the preceding or nearest year; papers relating to ephemerides of minor planets; 'Demonstration of Hollerith Machines'; material on P.Z.T. (Photographic Zenith Tube) Stars, 1950; J.G. Porter, 'The Orbit of a Meteor Stream'; Sadler, 'The Work of the Nautical Almanac Office' and 'Interpolation of the Lunar Ephemeris at Daily...

Scope and Contents Correspondence and other papers regarding the 1974 Herstmonceux Conference:1. OrganisationA circular describing the conference; the programme and agenda; two copies of a list of delegates; and a blank application form for attending the conference.2. AttendanceCorrespondence arranging the attendance of delegates: C.A. Murray to Sir Martin Ryle inviting him to attend; Murray to W. Fricke suggesting that he write a paper to be presented at the conference; Murray...

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Papers regarding the acquisition of a new R.G.O. Computer, including copies of the report of the Evaluation Team assessing the new computer, 1965; H.M.S.O./Treasury conditions for the tender, trial and maintenance of computers; notes by G.A. Wilkins on negotiations regarding the new computer and on comparisons of computers; and proposals/tenders from I.B.M., De La Rue Bull and Elliott.

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Correspondence and other papers on the general training of staff, including material on the Senior Management Seminar at the Civil Service College, 1972, attended by G.A. Wilkins, and on internal training courses.

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Correspondence of Dr G.A. Wilkins, N.A.O., and other papers regarding daily geomagnetic variations.

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Seventeen envelopes of the papers of G.A. Wilkins regarding geomagnetism. There is a reprint of the article 'New Methods for the Analysis of Geomagnetic Fields and their Application to the Sq Field of 1932-3' by A.T. Price and G.A. Wilkins, from 'Philosophical Transactions of the Royal Society of London', Series A, No. 1066, Vol. 256, pp. 31-98, 12 December 1963, with drafts, typescripts and proofs. The remaining papers comprise data, graphs, tables and notes.

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Photocopies of two papers by D.H. Sadler: 'Miscellaneous Notes on N.A.O. Records and Files', 25 January 1971, 16 pages, and 'Extracts, Relating to the Nautical Almanac from the Manuscript Book "Auto-Biographical Notes" by Edwin Dunkin...now in the Library of the Royal Astronomical Society', 2 June 1971, 6 pages. There is also the typescript of 'The Expanding Role of H.M. Nautical Almanac Office 1818-1975' by G.A. Wilkins, 1975, 7 pages.

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Correspondence and other papers regarding visits abroad by Dr G.A. Wilkins, N.A.O., including visits to the U.S.A. and Brazil.