Consists of: Correspondence of the Brown family during World War I. Photographs taken in France and England both during and after the war. Includes photographs of buildings damaged by bombing, memorials and graves, and reunion events after World War I. Maps covering areas of France, Germany and Austria, some of which show the position of trenches in World War I. Memorabilia relating to World War I including newspaper clippings, posters and documents. Publications including journals and comics published during World War I, as well as historical and creative works relating to, and published after, World War I.

Consists of letters and documents covering the life and work of Sir Lawrence, primarily relating to his time working for the Royal Air Force during World War I and World War II.

Consists of the professional and personal papers of Professor Frederick Charles Pybus. This also includes papers regarding his rare books and manuscripts collection.

Comprising most of family correspondence, with some content relating to estate and property and George Otto Trevelyan's political career. Also includes autographs and cuttings of notable figures.