Forty holograph letters from W[illiam] Rees ['Gwilym Hiraethog'], Liverpool, etc. to [Ebenezer Thomas] 'Eben Fardd', 1848-60 (the proposed Welsh translation of Chambers's Information for the People; the writer's review of 'awdlau' in Yr Amserau; the forthcoming publication of Telyn [Egryn; neu Gyfansoddiadau Awenyddol Miss Ellin Evans ('Elen Egryn)']; reviews by [Evan Jones] 'Ieuan Gwynedd'; observations on adjudications by the writer and others on chair and other competitions at eisteddfodau, with particular reference to Rhuddlan eisteddfod, 1850; appreciation of [John Jones] 'Talhaiarn'; the writer's family tree; criticism of Y Traethodydd; published and unpublished poetry by the writer; a girls' school to be opened at Porthmadog by two of the writer's daughters and the schooling there of one of the recipient's daughters; lectures and lecture tours by the writer; the fiftieth anniversary of the Welsh Congregational cause in Liverpool; the recipient's lecture to a men's society in the writer's church; criticism of [William Williams] 'Caledfryn'; the ingratitude of John Lloyd; an attack upon the writer by [Lewis William Lewis] 'Llew Llwyfo'; an anonymous attack in Y Cronicl by [John Ceiriog Hughes] 'Ceiriog'; decline in taste in current Welsh literature; an action for libel against Yr Amserau; the writer's visit to Lady Hall [at Llanover]; personal, including references to the death of the writer's son, David, and to the recipient's bereavements; etc.). The spine is lettered 'Llythyrau Hiraethog. MS'.

The file includes poems in memory of Grace Williams of Tuynyllan by Ellis Roberts [?'Elis y Cowper'], [pre-1789], and in praise of Madam [Mary] Wynne of Plasnewydd and Denbigh by T.E. [?Thomas Edwards, 'Twm o'r Nant'] [pre-1810] and Robert Davies [?'Bardd Nantglyn], [pre-1814], and an address by George Griffith to his tenants after the death of his father, [1834].

'A Reference List of the [nineteenth century] Periodical Literature of Wales', arranged alphabetically and chronologically.

The file includes the manuscript of Thomas Jones's edition of Wil Brydydd y Coed, by David Owen (Brutus). This satire on nonconformity and lay preachers was published in the Anglican magazine Yr Haul, between 1863 and 1865. Thomas Jones's edition was published by the University of Wales Press, in 1949. Also included are photocopies of Bangor MS 988B, being letters from 'Brutus' to 'Scorpion' (Thomas Roberts).

Papurau Gwilym Wyn yn cynnwys barddoniaeth a rhyddiaith, beirniadaethau eisteddfodol, traethodau a nodiadau ar gyfer sgyrsiau a phregethau, [1852]-[1914] = Papers of Gwilym Wyn comprising poetry and prose works, eisteddfodic adjudications, essays and notes for talks and sermons, [1852]-[1914].

Mae'r archif yn cynnwys fersiynau gwreiddiol llawysgrif o lawer o'i gynnyrch llenyddol, yn cynnwys barddoniaeth a thraethodau [c.1880]-1913, a dwy ddrama [c.1941]; torion o'r wasg a deunydd printiedig arall yn gysylltiedig â gweithgareddau Cymdeithas Unedig y Glowyr, Rhanbarthau Castell Nedd, Abertawe a Llanelli,1879-1894, a gohebiaeth, 1890-1939, yn enwedig â Syr Samuel Thomas Evans, AS = Contains original manuscripts of much of his literary output, including poetry and essays, [c. 1880]-1913, and two dramas, [c. 1941]; newspaper cuttings and other printed material relating to the activities of the Amalgamated Association of Miners, Neath, Swansea and Llanelli Districts, 1879-1894; and correspondence, 1890-1939, especially with Sir Samuel Thomas Evans, MP.