Forty letters to Owen Jones (1833-99) from the following correspondents: Stuart Rendel, Guildford, 1891 (New Year greetings, qualifying his assent in a certain letter to the proposition 'that Wales will never get home rule from Mr Gladstone'), Hugh Roberts, Bala College, [18]66 (a request for information about the examination), Hugh ag [sic] Ellinor Roberts, Blaenau Festiniog, 1891 (their wish to find a situation for their eldest daughter), John Roberts, Bala, [18]70 (a request for advice in view of his desire to offer himself to the Missionary Board), John Roberts, Tanyrallt, Abergele, undated (acknowledging congratulations [on the election result]), Jno. H. Roberts, Carnarvon, 1895-6 (6) (concerning material for a tune-book), [J. J. Roberts], 'Iolo Carnarvon' [postmark Portmadoc, [18]97] (expressing thanks in verse for a letter), Robert Roberts, Brynhyfryd, Abergele, 1866 and 1873 (2, the first to the Reverend G. Parry) (sending a letter and papers received from Mr Hughes, Gaerwen, the appointment of the addressee to a tutorship at Bala College), Thomas Roberts, Broniarth, Guilsfield, 1858-62 (5) (lodgings in London, reference to a storm, a request to the addressee to preach at Groes, asking about the date of the addressee's marriage), Thomas Roberts, Hendre Isaf, n[ea]r Pentrefoelas, [18]61 (a request for the extracts from Bailey's Festus which the addressee has translated into Welsh), Tho[ma]s Roberts, Bethesda, 1869 (2) (a request to the addressee to adjudicate at a competitive meeting), R. Leigh [?Roose [?Rhos]], Wrexham, [18]66 (wishing to know his position in the examination), and Daniel Rowlands, Llanidloes and Normal College, Bangor, 1863-76 and undated (17, one to [Mrs Owen Jones], with one letter to Daniel Rowlands from W[illia]m Williams, Crickhowell, 1870) (Y Traethodydd, the addressee's translation of 'Antigone', Y Goleuad, the Education Act, 1870, sums promised to a certain fund, acknowledging sympathy).

Ninety-four letters, 1919-1984, in Welsh and English, to Saunders Lewis from various correspondents, together with a few draft letters from Saunders Lewis and four letters to Margaret Lewis, written during her husband's imprisonment in 1937. Subjects discussed include Welsh nationalism, the award of DLitt honoris causa to Saunders Lewis, the Welsh Burial Grounds issue, 1928, and literary topics; enclosures include a copy of a draft constitution and articles of agreement, 1934, relating to self-government for Wales (ff. 161-95). Among the main correspondents are Edward Glyn Jones (13) 1919-28, Robert Williams Parry (14) 1927-44, John Arthur Price (5) 1928, E. Prosser Rhys (3) 1927-9, D. J. Williams, Fishguard (7) 1948-67, and Griffith John Williams (3) 1935-56.

Correspondence, papers and press cuttings, 1911-1912, relating to the Welsh Nationalist League (Cyngrair Cenedlaethol Cymreig), formed at Caernarfon in January 1911 to press for Home Rule for Wales on federal lines and organised by Dr Edward Lloyd Owen ('Iorwerth Feddyg') and John Williams ('Cambrensis'), both of Cricieth. There are also a few papers relating to the St David's Order of Chivalry (Urdd Arwrol Dewi Sant), founded in 1912. The correspondence, mainly addressed to 'Cambrensis', includes letters from W. Llewelyn Williams, MP, Walter F. Roch, MP, Sir J. Herbert Lewis, MP, Francis Edwards, MP, E. T. John, MP (8), Clement Edwards, MP, the Reverend E. Tyrrell-Green, Beriah Gwynfe Evans (2), Silyn Roberts and Lord Harlech.