Notes by John Bryn Roberts on political topics, Ychwanegu i'r clipfwrdd 833-912. Is-fonds [c.1892]-[1926]. Rhan oJohn Bryn Roberts Collection,
Various lists, Ychwanegu i'r clipfwrdd 913-921. Is-fonds [?1906]-[1926]. Rhan oJohn Bryn Roberts Collection,
Notes on things other than political, legal, etc, Ychwanegu i'r clipfwrdd 922-934. Is-fonds 1860-1926. Rhan oJohn Bryn Roberts Collection,
Electoral addresses, Ychwanegu i'r clipfwrdd 935-950. Is-fonds 1885-1924. Rhan oJohn Bryn Roberts Collection,