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