A collection of 26 letters, the majority of which are transcript copies.
Letters to Sion Wyn o Eifion from Dafydd Williams, 1820-1829.
Letters to Eben Fardd from Dafydd Williams, 1837-1859. Various subjects are discussed, including the railways where Dafydd Williams states that one railway is worth ten thousand Eisteddfodau as to its practical and beneficial results.
Letters to Eben Fardd from Sion Wyn o Eifion, 1823-1853.
Letters to Eben Fardd from Dr John Pughe (Ioan ap Hu Feddyg), 1844-1850. His letters testify that he came under the influence of the Plymouth Brethren whilst in Aberdyfi. He also writes about the publication of his translation on the physicians of Myddfai.
Letter to Owen Williams, Waenfawr from W. Wynn Williams of Menaifron, Caernafon, 1865 requesting information regarding the pedigree of a Dubliner.