Papers of the Rev. C. Tawelfryn Thomas, 1837-1938, comprising letters addressed to him from religious, literary and political figures, 1874-1938, mainly about biographical details of historical and contemporary ministers and poets, eisteddfod competitions, publication of books and articles, including Thomas's own work on Ieuan Gwynedd, the Independent College in Bala, personal matters, preaching engagements and ministers' appointments; stanzas composed by him; and poetry by William Cosslett (Gwilym Elian) and others, 1837-1903.

Papurau'r Parch. Meurig Walters, yn cynnwys nodiadau a phapurau ymchwil yn ymwneud ag Islwyn ar gyfer ei draethawd MA a chyhoeddi '"Y Storm" gyntaf gan Islwyn' [1960]-1980; cyfieithiadau Saesneg o farddoniaeth Islwyn ac erthyglau Walters ar Islwyn, [1960au-1970au]; drafft o'r traethawd PhD, 'Bywyd a Gwaith Islwyn (1832-78)', a gohebiaeth ynglŷn â'r traethawd, 1976-1987; copïau o ddeunydd cyhoeddedig gan ac yn ymwneud ag Islwyn, 1851-1876; nodiadau ar Joseph Harris [20fed ganrif]; a chopi teipysgrif 'Yr Ail "Storm" gan Islwyn', 1990 = Papers of the Rev. Meurig Walters, comprising research notes and papers relating to Islwyn for his MA thesis and publication of '"Y Storm" gyntaf gan Islwyn' [1960]-1980; translations into English of Islwyn's poetry and articles on Islwyn by Walters, [1960s-1970s]; draft PhD thesis, 'Bywyd a Gwaith Islwyn (1832-78)', and correspondence relating to the thesis, 1976-1987; copies of published material by and relating to Islwyn, 1851-1876; notes on Joseph Harris [20th century]; and typescript of 'Yr Ail "Storm" gan Islwyn', 1990.