(1) Papers relating to the Geodetic Association

Letter to the Admiralty concerning the Geodetic Association Conference in Rome, 1883.

Correspondence with Colonel A.R. Clarke concerning the Rome conference, 1883.

Letter to Dr Hirsch concerning resolutions passed at the Rome conference, 1883.

Letter to Col. Donnelly concerning copies of the proceedings of the Rome conference, 1883.

Telegram from Col. Donnelly stating that engineers are visiting him, 1883.

Correspondence concerning the meeting to discuss the Greenwich Meridian, 1883.

Letter from Col. Donnelly thanking Christie for attending the Rome conference, 1884.

Letter and copies of a report by Dr Hirsch, 1884.

Letter to Col. Donnelly enclosing Hirsch's report, 1884.

Telegram requesting a meeting with Col. Donnelly, 1884.

Letter to Col. Donnelly reporting a meeting with a member of the Standards Department, 1884.

Letter from the Admiralty concerning the survey of Malta and telegraphic connections with Alexandria, with a reply, 1884.

Letter from Col. Donnelly concerning the Warden of Standards, with a reply setting out W.H.M. Christie's view as to standards and survey requirements, 1884.

Letter from Col. Donnelly concerning the Greenwich Meridian standard, 1884.

Letter from Col. Donnelly concerning conference delegates, 1884.

Letter from Col. Donnelly giving details of a meeting with General Strachy, 1884.

Letters from the India Office concerning the 1884 conference of the Geodetic Association, 1884.

Letter to Captain Sir F. Evans, Hydrographer, concerning the International Geodetic Conference, 1884.

Letter from Col. Donnelly asking what steps should be taken to get the geodetic surveys started, with a reply from the Astronomer Royal, 1884.

Letter from Col. Donnelly stating the Astronomer Royal should be a delegate at the next conference, with a reply stating that the nomination should be approved by the Admiralty, 1884.

Letter from the Science and Art Department, with copies of correspondence concerning the appointment of delegates, and a reply from the Astronomer Royal, 1884.

Letter to Dr Fisher, with a copy of the delegates' list for the 1884 Conference of the Geodetic Association, 1884.

Notice of the death of General Dr Bayer in Berlin, 1885.

Letter from the Science and Art Department informing those concerned that the meeting in Nice had been cancelled, 1885.

Notice, in German, concerning Dr Bayer, 1885.

Papers and correspondence relating to the International Conference of the Geodetic Association and the possible dissolution of the Association, 1886.

Circular from the Central Bureau der Internationalen Erdmessung, Berlin, asking for statistics relating to the geodetic survey of India, 1886.

Card from Col. Donnelly concerning a meeting of the delegates to the Geodetic Conference, 1887.

Notice containing the names and addresses of Association members, 1887.

Minutes of the conference delegates meeting of 7 February 1887.

Notice from the Science and Art Department that the British membership is to be cancelled, 1887.

(2) Papers relating to the 'Association Geodesigne International'

Cuttings from 'Popolo Romano', 15-18 October 1883; 'L'Italia Militare', 19 October 1883; and 'Il Diritto', 18-25 October 1883.

Letters from 'Association Geodesigne International' requesting the names of British delegates, with a reply enclosing this information, 1885.

Printed circulars from the 'Association Geodesigne International', 1883-1885.

Letter, in French, from the 'Association Geodesigne International', 1880.

Telegram from General Fenew detailing his visit of 13 June 1890.

Letter from Col. Donnelly asking if the Astronomer Royal would act as the British representative at the Geodetic Association Conference in Rome in October 1883.

Written précis of correspondence with the Foreign Office, 1883.

Reply to Col. Donnelly's letter stating that the Astronomer Royal will become the British representative, 1883.

Correspondence concerning fees and expenses, 1883.

Correspondence concerning the Astronomer Royal's attendance at the Geodetic Association Conference in Rome in October 1883.

Correspondence with Col. Clarke concerning his visit to Rome at the time of the conference, 1883.

Letters, in French, from Dr Hirsch of Neuchatel, 1883.

Letter to the Secretary, Science and Art Department, outlining the conference arrangements and the proposals for an international meridian standard and also setting out the Astronomer Royal's comments on the conference decisions, 1883.

Printed circular, in Italian, containing the names and addresses of conference delegates, 1883.

Map left at the Royal Observatory by General Ferrero showing the journey to Greenwich, 1890.

Map left at the Royal Observatory linking the triangulations of Malta and Sicily, 1890.

A paper and correspondence between the Admiralty, Treasury and Astronomer Royal relating to the need for Britain to retain membership of the Geodetic Bureau, 1897.

(3) Papers relating to the International Geodetic Conference in England (1909)

Printed notices from the Geodetic Association relating to the conference in London and in Cambridge, 1909.

Correspondence with the Foreign Office, 1909, including a letter from the ambassador in Berlin concerning the conference.

Correspondence with G.H. Darwin of Cambridge, 1909, including a written report by the Astronomer Royal concerning the geodetic work carried out during the previous three years and work on the determination of the Greenwich Meridian.

Papers concerning the visit of the conference delegates to the Royal Observatory, 1909, including letters from G.H. Darwin concerning the times of the visit and the arrangements for refreshments, including the requirement for the Park Keeper to be on late duty at the Royal Observatory Gate to give the party access. There are also lists of the personnel on duty and the signatures of the visitors.

Request from E.R. Watts and Sons for a copy of the report on the 1909 Conference, with a reply rejecting the request, 1909.

(4) Papers relating to the International Geodetic Bureau

Correspondence with M. Forster of the Royal Society concerning the International Geodetic Bureau, 1896.

'The British Empire', a printed report by G.H. Darwin, 1899.

Letter from F.E. Spring-Rice asking if the Royal Society may name the Astronomer Royal as a British delegate to the International Geodetic Bureau.

Reply from the Astronomer Royal to the effect that he would not accept the invitation, 1897.

Letter from A.W. Runker asking him to reconsider, with a reply from Astronomer Royal, 1897.

List of International Geodetic Association conference dates, 1897.

Letter from A.W. Runker acknowledging Christie's reply, 1897.

Minutes and a report of the Geodetic Arc Committee containing reports by Gill and Ardagh on geodetic surveys in Africa, 1900.

Memorandum from the Foreign Office regarding sending copies of the report of the 13th International Conference of the Geodetic Association, 1901.

Memorandum from the Foreign Office regarding sending copies of the report of the 14th International Conference of the Geodetic Association, 1906.

Letter from G.H. Darwin, 1906, asking for a report of the geodetic work since 1903.

Letters of 1910-1912 transmitting Parts I-III of the proceedings of the conference of 1909.

Letter from the Treasury concerning the appointment of a new delegate to the Geodetic Association and the Astronomer Royal's agreement to serve as a British delegate, 1915.

Letter, in French, from R. Gautier of Geneva, with a reply, 1918.

Letter from R. Gautier concerning geodetic surveys and the meridian determination, 1918.

Letter and an enclosure from L. Bayer, Secretary of the 'Committee on Magnetic Surveys, Charts and Secular Variation', 1919, containing an extract from 'Science', 31 October 1919.

Letter from L. Bayer acknowledging the receipt of lantern slides and making reference to the 'Einstein' experiments at solar eclipse, 1919.

Letter from the Royal Observatory, Edinburgh, concerning proposals for a longitude net, 1920.

Letter from C. Chree concerning the proposals and explanations on magnetic surveys and instruments published by Col. Lyons, 1921.

Letter from Kew Observatory, 1921, containing proposals for questions at the Rome meeting of the International Geodetic Association in 1922.

Letter from the Assistant Secretary of the Royal Society inviting attendance from a Royal Observatory representative at a committee meeting, 1921, with the agenda and proposals for the meeting.

Further invitation to the committee meeting of 18 September 1921, including an agenda, in French, for the general conference in Rome in April 1922, and proposals for subjects of discussion at the conference with regard to upper air research.

Proposed subjects for discussion at the 1922 conference finalised by the British National Committee [1921].

Bibliography of geodetic, seismological and magnetic articles, 1923.

Letter from W.D. Lambert, Washington, asking for details of the Earth Tide study for previous years, 1923.

Typed report and proposals for subjects to be discussed at meeting of the National Committee of Geodesy and Geophysics at Madrid, 1924.

Bulletin of the International Geodetic and Geophysical Union, 1924.

Minutes of the committee meeting and resolutions to be put forward in Madrid, 1924.

Notice of the meeting to be held in Prague, September 1927.