Membership card for Duffield, invitation, conference programme, receipts etc. from Hôtel Palais d'Orsay, press clipping re conference, handwritten notes concerning interest in Australian observatory shown at conference, timetables, solar observations from existing observatories, May 1907.

Details about membership and establishment date of Societies; details of founding date, responsible authority, equipment, of observatories; diagram of telescope lenses, other notes on equipment; all in Duffield's hand, 1907.

Resolution at the Paris CongrIs proposed by Norman Lockyer (wording the same as handwritten notes in 4/1), extract from paper by C. M. Smith read to British Association supporting Australian observatory, letters from G. E. Hale, W. E. Wilson, C. Walcott, 1907.

Draft of unaddressed letter re practical, possibilities of a solar observatory, extract from publication with Sir Norman Lockyer's resolution, letter from University of Adelaide re observatory, pages from notebook, 1908.

Letters of support from A. Riccò, extract from 'Les Recherches Solaires' supporting the project, draft and copy of letter from Duffield to the Prime Minister of Australia in which he proposes that an observatory should be founded, 1908.

Typescripts of: Duffield's letter to the Prime Minister, letter from the Royal Society, Lockyer's resolution, extract from C. M. Smith paper, letters from G. E. Hale, W. E. Wilson, C. Walcott, A. Riccò, J. Eliot, M. Puiseux (much of this being fair copy of material contained in previous three files), 1908.

Notes concerning early stages of Duffield's efforts on behalf of observatory (see letter to Prime Minister in previous file); correspondence with: W. H. Bragg, G. E. Hale, J. Eliot, H. F. Newall, H. H. Turner, C. Muirhead Collins, McClean's promise of £500, J. M. Baldwin, C. M. Smith, C. Kinloch-Cooke, J. Oddie, A. Riccò, H. M. Hunt, J. Larmor as Secretary of the Royal Society of London, drafts of two brief reports, 1907-1909.

Drafts of letters of invitation to the meeting from Duffield, and some responses, 1909.

Handwritten drafts/notes for one or more talks on the sun and observation of the sun, one draft headed 'Australian Association Paper', n. d. [1909].

Including C. P. Lucas, Alfred Deakin, C. M. Collins, 1909-1910.

Including C. M. Collins, C. G. Abbot, King O'Malley, copies of letters from Duffield to Bruce Smith M.P., Littleton Groom M.P., Alfred Deakin, 1911-1914.

Correspondence with C. M. Collins, the Prime Minister and other government officials, 1914-1915.

Official correspondence; letter of support of Mt. Stromlo site from P. Baracchi; correspondence including C. M. Collins, King O'Malley, Alfred Deakin, C. P. Lucas; extract from Parliamentary debate; copy of petition in favour of observatory which was presented by Lord Avebury, Sir David Gill, Sir Frank Dyson, Professor H. F. Newall; 'Memorandum upon the Selection of the Site' by Duffield; 'Solar Physics Observatory' reply from Commonwealth Government; folder containing mainly items from previous files, e. g. J. Larmor, N. Lockyer, C. M. Smith, G. E. Hale, W. E. Wilson, C. Walcott, A. Riccò, J. Eliot, M. Puisseux, being letters or extracts, 1908-1915.

Letters confirming and discussing Duffield's appointment and the tasks to be undertaken immediately; also includes letters from H. H. Turner, A. Schuster, Senator G. Pearce, J. G. McLaren; documents re equipment for observatory; letters from F. W. Dyson, H. H. Turner concerning choice of director; photograph of equipment; notes on purpose of observatory and aims and duties of director; cost estimates for building and maintenance, 1922-1924.

Correspondence with Professor Sampson and Buckingham Works re Franklin-Adams Coelostat, picture of instrument (possibly coelostat); correspondence between Duffield and Baker & Co. re Prominence Spectroscope, letter from A. Fowler re same; correspondence, including receipt, re (shipping, purchase and insurance of) Farnham telescope, correspondence with Sir Howard Grubb and Sons Optical and Mechanical Works; two-page typed history of choice of site for observatory, 1908-1914.

List of assorted donations and bequests, e. g. J. Oddie,[?]. Farnham, F. McClean; correspondence re same with F. McClean, G. Syme, J. Oddie and other actual or potential donors, 1908-1913.

List of bequests and donations, correspondence re donations with donors (many apparently solicited from fellow passengers by Duffield on a voyage in 1909), correspondence with treasury re funds and accounts, 1923-1926.

Mainly correspondence and documentation with banks and solicitors about financial matters re what is referred to as "The Great Telescope Account"; also documents concerning Observatory Fund, including statutory declaration by George Weir Burns, 1927-1947.

Copy of trustees' report on fund transactions and covering letter from W. V. Lancaster addressed to Doris Duffield, 7 July, 9 October 1947.

Extracts of reports by Norman Lockyer on "Indian Observatories and Their Organization" and from the Indian Famine Commission, 1880, 1898.

'Memorandum upon the Proposed Solar Observatory in Australia', from Solar Physics Committee of Australasian Association for the Advancement of Science; 'Establishing a Solar Observatory in Australia', typescript of report of committee (Turner, Duffield, Cortie, Dyson, Eddington, Newall, Nicholson, Schuster); 'Establishing a Solar Observatory in Australia', published report of committee (Gill, Duffield, Lockyer, McClean, Schuster, Turner); entry re Observatory for 'Official Year Book of the Commonwealth'; 'Report of the Solar Physics Committee'; form letter presumably from Duffield appealing for support; 'Practical Possibilities of a Solar Observatory in Australia', by Professor T. W. E. David; 'Solar Physics and Meteorology', by H. A. Hunt; 'Forty-First Report of the Board of Visitors to the Observatory [Melbourne] together with the Report of the Government Astronomer', 1908, 1909, 1915, 1925.

Lecture and other notes for several talks, one set of notes dealing with solar spectroscopy, another with choice of site for observatory, 1908.

Typescript, 1922.

From registrar of Manchester University; T. B. Robertson; editor of Nature, 1923-1924.

Letter from the paper's editor asking Duffield to write a column; page of notes in Duffield's hand, 3 February 1925.

Typescript of specifications and suggested changes; plan for the residence, 21 February 1927, is housed with the oversize materials, 1927.

Publications: 'The Luminosity of the Night Sky; 'The Luminosities and Parallaxes of 350 Stars of Special Type B'; 'Measurements of Atmospheric Ozone'; 'Atmospheric Potential Gradient Observations'; 'Fraunhofer Intensity Tables', May 1928, February 1930, March, May, December 1934.

Two copies of 'Supplement to the Report of the Commonwealth Astronomer' for 1950, which contains a history of the Observatory from its conception (apparently by Mrs. Simenov: see letter from Bok in 4/34; annual reports from the Mt. Stromlo Observatory by Bart J. Bok, the director], 1957-1959, 1962, 1965.

Reprint of article, 8 June 1956.

Articles by Bart Bok, entitled 'Mt. Stromlo Observatory of the Australian National University', 'A Search for New Observatory Sites in Australia', 'Siding Spring Observatory' and 'Mount Stromlo Observatory', 'Mt. Stromlo Observatory', by M. J. Miller; printed plan of the layout of the 'Commonwealth Observatory, Mount Stromlo' n. d. housed with the oversize material, 1948, 1960, 1965-1966.

Articles and talks by Bart J. Bok entitled 'Paris Symposium on Radio Astronomy and World's Astronomers Meet in Moscow', 'The Interstellar Medium', 'Star Birth and Evolution', 'Report on Study Leave', 'The Southern Milky Way'; 'The Southern Milky Way', by J. B. Whiteoak; 'Measurement of Stellar Radiation', by L. H. Aller; 'Galactic Clusters', by A. R. Hogg; photograph of the Milky Way, 1958, 1961.

Two letters, which discuss Duffield's grave and what to do with his papers, 25 March, 4 May 1959.

From A. R. Hogg with questions re history of Perth Observatory; from Rob (?) re Canberra Rotary Club c. 1928 to which W. G. Duffield belonged; from Bart Bok with drawings of the proposed Duffield building at Mt. Stromlo, 1961, 1966, 1967.

Black and white photographic postcards from Mt. Stromlo of the observatory, telescopes, and various nebulae and stars; and covering letter, 18 November 1959.

Two old postcards, and a group of black and white photographs, of Mt. Stromlo and surrounding landscape, c. 1928, and 1959.

Three black and white photographs of telescope and a visitor's pamphlet, 1960.

Weather forecasting, A. R. Hogg, Canberra, Mt. Stromlo, sunspots, 1938.

Observatory, Canberra, weather prediction, 1939.

Advertisements for and appointment of observatory director, 1939.

Science congress Canberra; R. G. Giovanelli, 1939.

Observatory, telescope, solar eclipse, Canberra, 1940

Scientific exchange with India, n. d.