Stretching back to the headmastership of Dr. Doncaster, this collection comprehensively covers the correspondence, publications, photographs and other ephemera of the headmasters of Oakham School up to the present day. For many of the headmasters, correspondence and rolls calls are a significant theme in their series.

This collection also contains an excellent record of speeches and sermons given by G. Talbot Griffiths and John Buchanan.

The final series on reports covers the headmaster's, deputy headmaster's and registers writings on the state of the school, including topics such as building and estate development, admissions, the curriculum, examination results, and Old Oakhamians.

This series focusses on the headmastership of Rev Edward Vere Hodge (1879-1902) and contains items relating to the life at School in the late19th century, its staff and pupils. The series contains some of the earliest photographs of Oakham School's collection.

This series focusses on the headmastership of Walter Lee Sargant (1902-1929) and contains items relating to the life at School in the early 20th century, its staff and pupils.

This file focusses on roll call lists from the early 20th century, under the headmastership of Walter Lee Sargant.

This file focusses on various prospectuses published under the headmastership of Walter Lee Sargant in the early 20th century.

This series focuses on School House pupils and staff in the 20th century. Most of the series is made of house photographs, various informal photographs as well as records books and punishment books.

A School list of staff and pupils for the Summer term 1915. Contents: Trustees; Teachers; Forms VI to I; Honours List; List of Exhibitions and Prizes gained during the year; Royal Drawing Society.

This series focusses on the headmastership of Francis Cecil Doherty (1929-1935) and contains items relating to the life at School in the early 20th century, its staff and pupils.

This series focusses on the headmastership of Grosvenor Talbot Griffith (1935-1958) and contains items relating to the life at School in the mid-20th century, its staff and pupils.

This series focusses on the headmastership of Graham Smallbone (1985-1996) and contains items relating to the life at School in the 1980s and 1990s, its staff and pupils.