Papers and correspondence with various individuals concerning pure mathematics, 1880-1890, including J.C. Adams on the resolutions of the function xn + 1/xn - 2 na into factors; E. Lowey on tables of sines; R. Lehfeldt on geometrical bisection; J. Nye on the trisection of an angle of 60°; a note by Sir George Airy on a model showing the relation between a prism and a pyramid; R. Main on the trisection of a plane acute angle; a paper on the use of arithmometers in public offices; W. Hayden on the division of angles; and D. Nightingale on a problem concerning elephants.

Further papers and correspondence concerning pure mathematics, with calculations, 1893-1915, including G.H. Murray on the work of the late Dr Sang; Chas Bradbury on Brunsyiga calculating machines; G. Brothers on converging times; N.L. Fereday on a formula for the radius of curvature of an arc of a parabola in terms of Y; F. Penrose on a method of calculating eclipses; G.H. Cooper on the octinal system of notation; the Revd H. Algar on a plan for trisecting a triangle; correspondence with L. de Ball on his tables of refraction; Carl Bagge of Sweden sends various astronomical tables; W. Hayden on angular calculus; and C.H. Wallace on the solution of the 'three bodies problem'.

File of correspondence with C. Woodhead relating to various subjects, 1912-1915.

Printed arrangements for the London Meeting of the International Geological Congress, 17-22 September 1888.

Correspondence with Downing Street, 1889, including a report by the Governor on an earthquake at Accra, Gold Coast.

General correspondence with various individuals, 1889-1890, including correspondence on a minor earthquake felt in London on 14 May 1889 and a cutting from the 'San Francisco Chronicle' for 1 August 1889 concerning an earthquake on 19 May.