(1) Papers concerning astronomical methods

Correspondence with Mr Folie, Brussels Observatory, concerning diurnal nutation, 1886.

Correspondence with E.S. Odiari concerning a more accurate method of transit registration using musical notes, 1889.

Letter to B. Leowy concerning the determination of the constant of aberration, 1891.

Letter to A. Auwers proposing that a table of precessions or secular variations be published, 1891.

Correspondence with A. d'Abbadie concerning the variation of latitude, 1892.

Correspondence with W.E. Cooke of Adelaide Observatory concerning the reduction of zenith distance observations, 1892.

(2) Papers relating to variable stars

Correspondence with J. Birmingham concerning red stars and variables, 1882.

Correspondence with Oxford concerning a computed supernova in M31, 1885, including a cutting from 'The Daily Express', 10 September 1885.

Telegram from the Kiel Observatory regarding Nova Camelopardalis, 1885.

Correspondence with V.M. Compton-Roberts concerning the star of Bethlehem, 1887.

Correspondence with the Liverpool Astronomical Society on naming the new variable star in Cygnus, 1887.

Material by G.B. Howard on minima of Algol, 1890.

Letters from Mrs H. McDonald concerning a new star in Orion, 1890.

Papers and correspondence concerning Nova Aurigae, 1892, including a telegram from the Royal Observatory, Edinburgh, announcing the discovery; correspondence with 'The Times'; cuttings from 'The Times', 8 February 1892; and an interview from the 'Globe', 11 February 1892.

Correspondence on a outburst of [Birmingham-Espin] in Taurus, 1892.

Telegrams concerning Novae Normae, 1893.