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

This file focusses on admission prospectuses and various publications in the 1930s.

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 file focusses on admission prospectuses published throughout G. Talbot Griffith's headmastership.

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 file focusses on letters sent/received by G. Talbot Griffith.

A prospectus for the school including staff list, trustees, the history of the school, information on the timetable, uniform, holidays, chapel, boarding, curriculum, Libraries, games, admission, scholarships, day boys and pocket money. Also includes several photographs of around the school, and a sketch of rugby players. Items A to R

A prospectus for the school including staff list, trustees, the history of the school, information on the timetable, uniform, holidays, chapel, boarding, curriculum, Libraries, games, admission, scholarships, day boys and pocket money. Inside are a bookle on the rules of the Old Oakhamian Club and a membership slip. Items A to K

This series relates to various annual reports presented to the Trustees, including Headmaster's reports, Registrar's reports and Second Master's reports. The series spans over three Headmasters, John Buchanan, Richard Bull and Graham Smallbone.