The editor's own set of Cymru (O. M. Edwards), Vols. 1-44, 1891-1913 containing manuscript notes, some original manuscripts of contributions and letters by correspondents.
Llythyrau, [1892]-[1917], at y wasg gan gynwys rhai oddi wrth O. M. Edwards a John Richards (Isalaw). Ceir llythyr yn Gymraeg oddi wrth John Owen (Ap Glaslyn).