Sous-fonds consists of Riddehough's letters and copies of his poetry sent to Nalos.

Sous-fonds consists of correspondence to Brennan from Riddehough and Brennan and Doreen Nalos from Riddehough. These often included copies of his poetry. The series also includes correspondence to Brennan from Riddehough's acquaintances after his death and from the trust company concerning his estate.

The sous-fonds consists of approximately 17 cm of outgoing letters and poetry sent by Riddehough to the Murray and Marian Cowie (1960-1976).

Robertson would have met Geoffrey Riddehough while studying English and History at the Fairview campus. Riddehough wrote to Robertson seeking academic and professional advice. Robertson was also responsible for establishing the Classics Club, of which Riddehough was a member, which was maintained until the early 1990s. Sous-fonds consists of Riddehough's correspondence to Robertson during the years he studied overseas in London and Paris.