The commonplace book of Robert Roberts, Tyddyn y Felin, an assistant minister of 'Yr Hen Gapel', Llanuwchllyn, containing miscellaneous records and extracts, relating particularly to the affairs of 'Yr Hen Gapel'; copies of notices to quit to tenants of the Glanllyn estate, 1830; a list of persons qualified to serve on juries in Llanuwchllyn, 1834; correspondence relating to Coward's Trust, 1834; extracts from letters by emigrants to the United States of America, 1833-1835; 'Subscriptions when Revd. M. Jones came to Llanuwchllyn'; lists of houses in Llandrillo, Llangower, Llanyckil, Llanfawr, and Llanymowddwy; and lists of dissenting meeting-houses.

A group of holograph letters and postcards from the collection of, and mainly addressed to, John Jones, J.P., bookseller, Bethesda. The writers include J. N. Crowther ('Glanceri'), 1906-1922; [Richard Davies] ('Mynyddog'), undated; Owen Evans, Liscard, 1913; Dame M[argaret] Lloyd George, Criccieth, to H. E. Jones, Bethesda [1935]; H[ugh] D[erfel] Hughes, 1864; Rhys J. Huws, Staylittle, 1906; [John Jones] ('Mathetes'), Llangollen, 1858; L. D. Jones ('Llew Tegid'), Bangor, 1904-1917; [Sir] Hugh Owen, London, 1878; W. J. Parry, Bethesda, etc., 1898-1899; John H. Roberts, Liverpool; [Samuel Roberts] ('S.R.'), Conway, 1882; [John Thomas] ('Eifionydd'), 1904; and Henry J. Wilson, House of Commons, 1904. Also included in the group are an English translation of a letter from John Jones to his mother, 1864, and an incomplete address by W. Jones on Sunday School instruction, 1858.

Letters to Griffith Owen, Vaner, Llanelltyd, near Dolgellau, E. W. Evans, and others in the Dolgellau district, from John and Margred Owen, Baraboo, Wisconsin, 1847; William and Margaret Bebb and William G. Bebb, Vanwert, Ohio, 1850; Edward [?], Miliken’s Bend, Louisiana, 1863; J. F. Williams, St. Paul, Minnesota, 1877; T. Ll. Williams, Racine, 1907; and John Gwylym Owen, Portage, 1907; together with photographs of the Caledonia Welsh church and Caledonia home-coming, 1907, etc.

Two groups of letters from Welsh emigrants to America, 1846-1847, 1870-1878, together with letters relating to emigration from Wales, 1948-1955.

Transcripts of letters, 1816-1818, written to relatives in Merionethshire by David Jones (Albany, New York), John Richards (Johnsburgh, New York), Hugh and Catherine Thomas (Trenton, Oneida) and W. Thomas (Utica), and a transcript of part of a letter from David Richard, with notes by Dr Henry Owen, Llwyngwril and Dolgelley.

Biographical and bibliographical notes and collectanea; four letters, 1872, from Evan M. Williams, Mineral Ridge, Ohio, an emigrant from Merthyr Tydfil, to his parents and brother in Wales; copies of two letters [1925] from Leah Hughes, Brooklyn, an emigrant from Bodfari; etc.

Letters, 1855-1904, of miscellaneous provenance, including letters, 1871-1894, to and from Welsh emigrants to Australia and the United States of America (ff. 11-24, 49-50, 69-70, 108-123); a letter, 1855, from the artist Penry Williams relating to a proposed visit by Lady Charlotte Guest to the Vatican; and a letter, 1857, from the Rev. Calvert Richard Jones, photographic pioneer, to his friend Christopher Rice Mansel Talbot of Margam, written from Nice. Other correspondents include Owen M. Edwards (1) 1891, Thomas E. Ellis (1) 1892, David Lloyd George (5) 1879-1892, William E. Gladstone (3) 1857-1875, Sir Lewis Morris (2) 1890-1895, Daniel Owen (1) 1885 and John Thomas (Pencerdd Gwalia) (4) 1891-1904.

Miscellaneous holograph letters, 1806-1914, written by the following: D[avid] Thomas ('Dafydd Ddu Eryri'), Waunfawr, 1806, to Dafydd Owen ('Dewi Wyn o Eifion'), Gaerwen, Llanystumdwy (contributions to Y Greal), R. H. Richards, Llanfair isaf, 1823, to D[avid] Owen ('Dewi Wyn o Eifion') (appreciation of his 'awdl' Elusengarwch, arrangements for addressee to address Cymdeithas Cymroaidd Llanfair), G[riffith] Williams ('Gutyn Peris'), Braich Talog, Llandegai, 1822, to Robert Williams ('Robert ap Gwilym Ddu'), Betws, Llanystumdwy (letters were his chief delight because his work prevented him travelling, absence of Caernarvonshire poets from the Caernarvon eisteddfod, reading old manuscripts, refers to a manuscript of Lewis Morris, a manuscript of William Elias of Plas yn Glyn in the possession of a captain at Holyhead, the manuscript of Angharad James of Penamnen, wishes to be remembered kindly to Dewi Wyn and to assure him that he was not 'Brytyn') (published in Llais Rhyddid, XIII, pp. 111-114), J[ohn] Richards ('Iocyn Ddu'), Llanerchymedd, 1824, to Richard Jones ('Gwyndaf Eryri'), Caernarvon (commends the intention to form a poetry society but warns of the dangers of disputes, has sent his opinion on the 'Awdlau ar Ymweliad y Brenhin a Môn' to the appropriate place, addressee's prize winning 'awdl' on 'Cerddoriaeth' at the Caernarfon eisteddfod of 1821), John Williams ('Sion Dwyfor'), Y Ffrwdgoch, undated, to Richard Jones ('Gwyndaf Eryri'), y Bontnewydd Gerllaw Carnarfon (possibility of writer competing at an eisteddfod, sale of (?addressee's) awdlau) (published in Llais Rhyddid, XIII, pp. 115-116), John Williams ('Ioan Twrog'), Factory, Maentwrog, 1836, to Richard Jones ('Gwyndaf Eryri'), Carnarvon, (names of competitors in a 'pryddest' competition in order of the adjudication, requires a weaver, states his rates of pay for various weaving work, [William Rees] 'Gwilym Hiraethog', Llynlleifiad, 1845, to Robert Williams ('Robert ap Gwilym Ddu'), Monachdy bach, Llangybi (enclosing 'Cywydd Anerch y godidog Brif fardd R. ab Gwilym Ddu (cf. Caniadau Hiraethog (Dinbych, 1855), pp.174-177)), [Edward Roberts] 'Iorwerth G[lan] Aled', Rhyl 1851 to [Ebenezer Thomas ('Eben Fardd')] (criticism of Richard Parry ('Gwalchmai') and his poetry), Robert Ellis ('Cynddelw') (2) to [John Edwards] 'Meiriadog', one from Sirhowy, 1851 (addressee's intention of publishing a monthly magazine Yr Hyfforddwr, denominationalism in Wales, writer was preparing a primer on Welsh prosody, writer's opinion of the 'gorsedd', writer's family), the other (a copy) from Caerynarfon, 1871 (writer preparing a biography of the Reverend J. Williams, Rhos, requests addressee's recollections of him, is considering collecting his poetry for publication in a 3/- or 4/- volume, intends finishing his commentary [on the New Testament] and to publish a book entitled Athrawiaeth y ddau Cyfammod), D[aniel] Silvan Evans, Talybont by Aberystwyth, Llangïan etc. to Ebenezer Thomas ('Eben Fardd'), Clynnog, 1843-60 (9), (writer's publication Blodau Ieuainc, commends the publication of a Welsh translation of Chambers's Information for the People, addressee's contribution to Y Brython, seeks addressee's help in collecting colloquial words and phrases for his dictionary), D[aniel] Silvan Evans, Llan ym Mawddwy, 1865, to O[wen] Jones ('Manoethwy'), (addresseee's offer to copy manuscripts in the British Museum), D[aniel] Silvan Evans, Llanymawddwy and Llanwrin etc., 1869-94 (69), to John Jones ('Myrddin Fardd'), Chwilog, with some (20) letters from John Jones to D. Silvan Evans (enquiries concerning books and words, bookbinding, receipt of books, references to other collectors and their collections viz. [Edward] Breese, E[dward] H[umphrey] Owen, [St George] Armstrong Williams, the Plas Gwyn (Panton) collection of books and manuscripts moved to Plas Hen, Llanystumdwy, 1890); Rowland Vab Owen, Trenton and Remsen, Oneida, New York, 1868-70(2), to Owen Williams ('Owain Gwyrfai'), Waunfawr, and John Roberts, Poultney, Vermont, 1871, to Owen Williams ('Owain Gwyrfai'), enclosing a letter to John Roberts from Rowland Vab Owen, Ty Seth Llwyd, Utica, 1871 (Rowland Vab Owen's searches in America concerning Abraham Williams ('Bardd Du Eryri') and information relating to Rowland Vab Owen's family in Wales) (these four letters have been published in Llais Rhyddid, Vol. XIII, pp. 41-8), W[illiam] O[wen] Jones (editor of Llais Rhyddid), Liverpool, 1914, to [John Jones] 'Myrddin Fardd', (returning two letters published in Llais Rhyddid), various writers ('Pryse] Pryse Loveden, Gogerddan, etc.), 1850-56 (12), to D. Douglas Wemyss, Dalkey, Dublin (replies to requests for help in obtaining employment).