This collection contains three autograph albums and two sitter books, the details of this are as follows:
- Autograph Album, c. 1932-c. 1940, (formerly MS 4)
It is thought that Coster invited sitters to sign this album when their portraits were taken, signatures in the album include: Siegfried Sassoon, George Bernard Shaw, John Galsworthy, J. B. Priestly, Peggy Ashcroft, Rebecca West, Esmond Romilly, Vera Brittain, W. Somerset Maughan, Edith Sitwell, Stella Gibbons and Sylvia Pankhurst. Some signatures are accompanied by drawings or notes, including self portraits by Alfred Hitchcock and Sir David Low, and a watercoloured picture by Rex Whistler. The front of the volume contains a note to Coster from Eric Gill. This volume is thought to have been rebound at an unknown date.
- Autograph Album, c. 1940- c. 1946 (formerly MS 5)
It is thought that Coster invited sitters to sign this album when their portraits were taken, signatures in the album include: Jacob Epstein, Constant Lambert, Noel Streatfield, Louis Mountbatten, Evelyn Waugh and Harold Macmillan. Loose pieces of paper have been inserted throughout the volume bearing autographs, including one for Bertand Russell. The volume was previously used as a commonplace book titled 'Selections from favorite authors and contributions from favorite friends' by Mary Ann Martens (pages 1-14).
- Autograph Album, c.1953-c. 1957 (formerly MS 3)
It is thought that Coster invited sitters to sign this album when their portraits were taken, signatures in the album include: R. Vaughan Williams, Alexander Fleming, and C. Day Lewis. The volume had previously been used as a scrapbook with images and writings inserted on some pages, it is unknown who did this. Several loose pieces of paper have been inserted throughout the volume bearing autographs, including one for Charles Kingsley Adams, NPG Director 1951-1964. The volume is thought to have been rebound at an unknown date.
- Sitter Book, 1926-1934 (formerly MS 22)
Contains list of sitters arranged alphabetically and then by year, Includes sitters name, negative number and type of photograph produced. Some of names have crosses marked next to them or have been struck through.
- Sitter Book 1953-1959 (formerly MS 23)
Contains list of sitters arranged alphabetically and then by year, Includes sitters name and negative number.