This series focusses on the headmastership of Dr John Doncaster (1808-1846) and contains items created by the headmaster himself as well as items relating to the life at School in the early 19th century and Old Oakhamians, in particular James and Augustus Padley.

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 John David Buchanan (1958-1977) and contains items relating to the life at School in the 1960s and 1970s, its staff and pupils. The bulk of the series consists of books, publications, letters, speeches and sermons written by Mr Buchanan himself.

This sub-series relates to the history of Old School, oldest building of Oakham School, in Cutts Close park. It is made of a collection of photographs and art work; of newspaper cuttings and letters, mostly relating to the debate concerning the refurbishment of the building and preserving the frescoes painted by Mary Sargant Florence.

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 Rev William Spicer Wood (1846-1875) and contains items created by the headmaster himself as well as items relating to the life at School in the mid-19th century.

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 letters sent/received by John Buchanan, chiefly during his headmastership (1958-1977).

This series relates to the History of Shooting at Oakham School. The collection is made of team photographs, score books and ephemera relating to successes at Bisley. The collection spans from the 1950s to 1980s.