Papurau Evan Williams Llanfrothen, sir Feirionnydd, neu rai a ddaeth i'w feddiant, 1865-1909, gan gynnwys ystadegau Ysgol Sul y Rhyd,1896-1902; cofnodion cyhoeddi Suliau yn Rhyd, 1892-1907; nodiadau pregethau David Mathias Williams,1905-1908; cyfriflyfrau groser, 1884-1909; a llythyrau at Evan Williams, 1890-1905 = Papers of, or acquired by, Evan Williams of Llanfrothen, Merionethshire, 1865-1909, including statistics of Rhyd Sunday School, 1896-1902; records of Sunday publications at Rhyd, 1892-1907; sermon notes by David Mathias Williams, 1905-1908; grocers' account books, 1884-1909; and letters to Evan Williams, 1890-1905.