Letters from Herbrand Russell, 11th Duke of Bedford, to Peter Chalmers Mitchell regarding animals available for purchase by the Zoological Society of London, including a zebra and a Cow Aurox from Hagenbeck at Hamburg
Correspondence between John Johnson of the University Press Oxford, to Julian Sorell Huxley regarding estimates for printing
Correspondence between John Spedan Lewis, of the John Lewis Partnership, and Julian Sorell Huxley regarding the design and construction of a new Elephant and Rhinoceros House at the Zoological Society of London
Correspondence between J W Milne and Julian Sorell Huxley regarding the financing of the construction of a new Elephant House, and a donation from Lord Leverhulme
Letters from Julian Sorell Huxley to Sheffield Airey Neave regarding meeting and business of the Record Committee of the Zoological Society of London
Correspondence between Julian Sorell Huxley and William Lutley Sclater regarding meetings of the Record Committee, a successor to William Lutley Sclater following his retirement
Correspondence between Julian Sorell Huxley and H Steinmetz of the Zoologischen Gartens zu Berlin
Letters from Arthur Walden, Marquess of Tweedale, to Philip Lutley Sclater regarding an offer from the Duke of Wellington of two male llamas, Fellowship of the Zoological Society of London, specimens of an insect, and subscriptions to the Society
Letters from Wilhelm Carl Hartwig Peters of the Museum Regium Zoologicum, to Philip Lutley Sclater regarding Huxley's paper, a sketch of the plan of the monkey house, plates, specimens in his possession, and his memoirs
Letters from Thomas Littleton Powys to Philip Lutley Sclater regarding eagles and newts in his possession