Correspondence concerning Sir George Airy's numerical lunar theory, 1880.

Correspondence with S. Newcomb, Washington, concerning lunar theory, 1880.

Letter from Archdeacon Kaye concerning the Moon's influence on terrestrial motion, 1880.

Correspondence with T.E.V. Oppolzer concerning errors in the lunar tables, 1880.

Correspondence with J.D. Forbes, Glasgow, concerning the trans-Neptunian planet, 1880.

Correspondence with R.S. Ball concerning his 'elements of astronomy', 1880.

Correspondence with B.G. Jenkins, London, 1881, concerning the Earth's perihelion in 1834.

Letter from J. McKellar asking for a copy of G.B. Airy's 'Gravitation', 1880.

Correspondence with the Revd E. Ledger, Ipswich, concerning the perihelion of Neptune and a geometrical lunar theory, 1883.

Correspondence with W. Hayden, Chichester, concerning various questions of lunar motion and position, 1882.

Letter from R. Sherwood, London, concerning the perihelions of Saturn and Neptune, 1882.

Correspondence with M. Peroche, France, concerning the eccentricity of the lunar orbit, 1883.

Correspondence with E.J. Stone concerning errors in Hansen's lunar tables and with Sir George Airy on his numerical lunar theory, 1883.

Correspondence with Sir George Airy concerning his lunar theory and the assistance of a computer, 1881-1884.

Correspondence with J. Brennan, Jamaica, and with C.G. Stromeyer, London, concerning methods to determine solar parallax, 1886-1888.

Correspondence with E. Neville, Naval Observatory, concerning lunar theory, 1888-1889.

Correspondence with S. Newcomb and J.C. Adams concerning the publication of errors in the Greenwich observations of the minor planets, 1890.

Letter from Carle Bragge, Sweden, sending a table of the Sun and Moon for inspection, 1891.

Predictions of the Moon's error in right ascension for Captain Grant's boundary work in Mashonaland, 1892.

Correspondence with W.P. Lee, Australia, concerning the effects of irradiation on the observed solar diameter, 1892.

Correspondence with the Radcliffe Observatory, Oxford, 1892-1893, enclosing tables of 'Defective Illumination Angles for the Moon, 1890-1893'.

Letter from Captain Lecky, 1893, asking for information as to the probable error in the lunar tables for 1890.

Letter from A.H. Howe, Scotland, asking for information on the motion of lunar perigee, 1893.

Letter from A. Shuster, Manchester, asking if the Earth's rotation is constant, 1893.

Correspondence with Dr Bolte, Hamburg, regarding errors in the lunar tables, 1893.

Correspondence with S. Newcomb, Washington, 1877-1891, concerning errors of lunar tables and errors of planetary tables, 1891-1892.

Letter from Senor Carlos de Costa, 1893, asking for information on solar parallax as found from the 1882 transit of Venus, with correspondence from the Radcliffe Observatory, Oxford, in the negative.