Papurau, 1965-2010, gan gynnwys casgliad o lythyrau a chardiau post o'r Wladfa, yn bennaf oddi wrth Mrs Elisa Dimol de Davies, Trelew, at y rhoddwr a'i deulu.

Nodiadau, rhaglenni, taflenni, a chyfnodolion Cymraeg a Saesneg, 1965, a grynhowyd gan Dr Marshall Lloyd, yn ymwneud â'i ymweliad â Phatagonia ar achlysur dathlu canmlwyddiant Y Wladfa Gymreig. = Notes, pictures, programmes, leaflets, and Welsh and Spanish periodicals, 1965, accumulated by Dr Marshall Lloyd, relating to his visit to Patagonia during the centenary celebrations of the founding of Y Wladfa, the Welsh colony.

Research papers of Kenneth E. Skinner, 1911-1979, mainly notes, photocopies and manuscript and typescript transcripts of unpublished material collected by Dr Skinner while undertaking research in Britain and Argentina for his doctoral thesis 'The relationship between the Welsh colonies in Chubut and the Argentine government'; printed material and periodicals, 1921-1979; and a photograph album of views of Chubut.

Cyfres o bum englyn penfyr yn dwyn y teitl 'Cŵyn yr Indiad', yn llaw R. Bryn Williams, [?1980], sydd yn ddetholiad o benillion o'i awdl 'Patagonia', a enillodd iddo Gadair Eisteddfod Genedlaethol Abertawe 1964 (gw. R. Bryn Williams, Patagonia (Aberystwyth, 1965), tt. 32-33, ac R. Bryn Williams, O'r Tir Pell: Cyfrol o Gerddi (Lerpwl, 1972), tt. 86-87). = A series of five englynion penfyr titled 'Cŵyn yr Indiad', in the hand of R. Bryn Williams, [?1980], being a selection of verses from his awdl 'Patagonia', which won him the chair at the 1964 National Eisteddfod in Swansea (see R. Bryn Williams, Patagonia (Aberystwyth, 1965), pp. 32-33, and R. Bryn Williams, O'r Tir Pell: Cyfrol o Gerddi (Liverpool, 1972), pp. 86-87).

Particulars by Mihangel ap Iwan concerning the consumption of meat by rural workers in Nant y Pysgod, Patagonia, 1928-1929.

Tystysgrif cyfranddaliadau yng nghwmni cydweithredol dyfrhau Y Gaiman, Chubut, Patagonia, Yr Ariannin, yn enw Aaron Jenkins, 5 Medi 1934, wedi ei harwyddo gan John ap Hughes, Robert Evans a Myrddin Griffith.

A collection comprising correspondence, legal papers, press cuttings and other material relating to the Wladfa Gymreig in Patagonia, including material relating to Cwmni Masnachol Camwy; journals of Llwyd ap Iwan and an account by him of the Chubut Valley.

Portions of the manuscripts of three published works by D. S. Davies relating to the Welsh colony in Patagonia.

Manuscript and typescript drafts, some incomplete, [?1989]-1991, of A wider sky (Llandysul, 1991); together with a copy of the galley proofs, 1991, for the Introduction and the chapter relating to France; an agreement, 1991, between the author and the publisher; and a bookseller's catalogue, 1993, in which the work is listed.

Screenplay by Ruth Carter titled Le Jeu Du Roi, based on the novel of the same name by Jean Raspail, together with English version titled Letters From Patagonia and Welsh translation by W. O. Roberts titled Brenin Y Wladfa; also including post-production schedule and contacts list. Some folios annotated.

Miscellaneous papers including 'Hanes dechreuad y Genhadaeth yn Penybont yn 1826' by Ebenezer Williams 'Penillion ar Ymadawiad John Lewis ... a'i deulu i Patagonia', notes of a sermon delivered by William Evans (Tonyrefail) at Jerusalem, Ton, August 11, 1878, and circular letters and leaflets relating to various religious and political activities mainly in the Rhondda district of Glamorgan.

Holograph manuscripts of articles entitled 'Pregethwyr y Methodistiaid yn Sir Drefaldwyn' (by Evan Davies, Trefriw), 'Gwylan Benddu' (by Richard Morgan, Llanarmon), and 'Ysgol yn yr Andes' (by Lewis Humphreys).

Llythyrau, 1993-2016, a dderbyniwyd gan Gruffydd ac Eifiona Roberts, a fu'n athrawon gwirfoddol yn Y Wladfa rhwng 1994 a 1995, oddi wrth Eurgain ac Owen Tudur Jones, Luned Roberts de Gonzales, Gweneira Davies de Quevado, Alwina Huws de Thomas, Gwalia Davies de Evans, Ieuan Williams, Irma Roberts de Williams, Eryl ac Ieuan Jones, Marlin Elis de Millado, Alwina Thomas, May Williams de Huws, Neved Williams, Elena Davies de Arnold, Dewi Mefyn ac Eileen Jones, Erie James, Clydwyn Jones, Arianna Jones de Roberts, Delma Williams, Margreta Evans de Mesa, Elmar Davies de Macdonald, Meillionen Jones de Davies, Sibyl Owen de Evans, Eryl Williams de Remires, Aira Roberts de Huws, Esther Evans de Huws, Iola Evans, Gwenni Evans de Williams a Rona Davies.

A volume containing nine autograph sermons by the Reverend Hugh Davies ('Hywel Ddu o Arfon', d. 1909), curate of Glasinfryn, co. Caernarfon, 1876-83, afterwards serving with the South American Missionary Society at Chubut, Patagonia, with details of the date and place of delivery, 1871-9 and 1906-8, together with an index of texts (f. i verso).

Pedwar drafft o'r erthygl 'Ymfudo i Batagonia, a gyhoeddwyd yn Y Genhinen, 15.3 (Haf 1965), 375-377.
Mae un drafft mewn pad ysgrifennu sydd yn cynnwys rhannau o ysgrifau eraill.