Correspondence, Ychwanegu i'r clipfwrdd NLW MSS 18094-18102. Is-fonds 1675-1943. Rhan oEdward Owen Papers,
Manuscripts, Ychwanegu i'r clipfwrdd NLW MSS 17974-18093. Is-fonds 1675-[20 cent.]. Rhan oEdward Owen Papers, Formerly Edward Owen MSS 1-133.