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 focuses on the history of the 1993 Organ in the School Chapel. After the 1930 organ expired and was replaced by a computer organ in the 1980s, the headmaster Graham Smallbone commissioned for a new organ to be built. Some items highlight the various proposals, the correspondence focuses on the building and installation of the organ and the photographic file finally shows the organ in Chapel.

This series focuses on the history of the organs in the School Chapel, from the first one installed in 1930 to the current instruments built in 1993.