Correspondence between David Gill and various individuals, including members of other observatories, divided into nineteen sections:

Professor R.H. Tucker, W.W. Campbell, J.E. Keeler and E.S. Holden of the Lick Observatory, April 1896 - January 1900.

W.H. Maw, London, 21 February - 13 June 1899.

Professor Simon Newcomb, Washington, 13 January 1896 - 31 January 1900.

H.F. Newall, Cambridge, 3 March - 9 October 1899.

Professor Vogel and Dr G. Muller, Potsdam, 1897 - 27 June 1899.

Radcliffe Observatory, Oxford, E.J. Stone and A.A. Rambaut, 29 March 1897 - 31 July 1899.

Dr A.W. Roberts of Laverdale, 15 May 1894 - 27 January 1890.

H.C. Russell, Sydney Observatory, 2 March 1896 - 31 October 1898.

Professor Schur, Gottingen, 16 October 1897 - 18 October 1898.

Professor T.J.J. Seer, Lavell Observatory, City of Mexico, 24 November 1896 - 22 May 1899.

Dr Otto Struve, Karlsruhe, 14 August 1897 - 23 November 1898.

Various American professors, 27 April 1899 - 1900.

General J.F. Tennant, London, 24 May 1896 - 10 April 1898.

Professor H.H. Turner, University Observatory, Oxford, January 1896 - 6 March 1900.

Professor F.L. Wadsworth, Yerkes University, 31 July 1897 - 19 February 1898.

Professor W. Harkness and M. Updegraff, U.S. Naval Observatory, 26 June 1899 - 4 April 1900.

Paris Observatory, 23 May 1896 - 7 June 1900.

Various correspondents in England, including G.H. Darwin, George Baden-Powell and E.W. Maunder, 21 June 1896-1899.

Various correspondents in Europe and India, 11 February 1898 - 1899.