The library contains 29 volumes of Ruskin's Diaries spanning the years 1835 to 1888. Many of these are unpublished. The library also contains approximately 7,400 letters, including 3,000 letters with his cousin Joan Severn and others such as Thomas Carlyle, Robert Browning and his publisher George Allen.
There are approximately 350 books from Ruskin's own personal library as well as 39 volumes of his published writings in various languages.
There is a selection of 1,500 drawings and 500 prints in the collection of which 950 are by Ruskin.Other artists include Samuel Prout, Francesca Alexander and Albert Goodwin. These prints are examples of Ruskin's interest in landscape and architecture, but there are also many nature studies, copies of Old Master paintings, and intimate portraits. There is a large number of photographs that contain 140 from Ruskin's collection with an important group of 125 daguerreotypes, mostly of Gothic architecture, made under his direction.