Several scrapbooks of manuscripts, newspaper cuttings, photographs, autographs and letters, 1869 - 1953. They include the works of several poets such as Bryfdir, Glyn Myfyr, W. H. Reese, Ap Alun Mabon, Llwyd Eryri, Iestyn, Gomer Richards, Eos Gwynant, Llew Twrog, Bob Owen of Dolwyddelan, O. M. Lloyd, Moelwyn, R. R. Morris and Rolant Wyn. Amongst the correspondents are eminent people such as Michael D. Jones, George M. Ll. Davies and T. Gwynn Jones. Miscellaneous items are also included which reflect life in Ffestiniog, such as a poster of a boxing match.
Letters to John William Jones and others from several correspondents including Bob Owen Croesor, John Jones (Ioan Brothen), Lewis Jones of Granville, New York, Ap Alun Mabon, National Library of Wales, Iorwerth Peate and Eifion Wyn. Also, a series of letters from J. Lloyd Humphreys, manager of the Oakley Quarry, 1922-1933.
The work of John William Jones consists of an original manuscript of a collection of stories published under the title Y Fainc 'Sglodion. Also, an essay on Rolant Wyn.
There are also collections of poetry by J. Moelwyn Hughes, Glyn Myfyr, Alafon, Barlwydon, Elfyn, Ioan Brothen and Rolant Wyn.
Rate book of Deneio parish, 1867 with names of occupiers, owners, description of property, situation, rentals, rateable values, arrears. Also, minutes of Ciniawdy Sinc y Mynydd, Ffestiniog and a speech by Rev. W. Pari Huws, 1913.