Kammala jumla mai zuwa: A cikin 1981, "Eryr Pengwern" ("'The eagle of Pengwern"'), wanda aka saita a ƙarni na 7 na Powys kuma ya dogara da Heledd Saga, Jones ne ya rubuta shi don mayar da martani ga barazanar Gwynfor Evans na ƙaddamar da yajin aikin yunwa don tashar talabijin ta Welsh. Shekaru huɗu bayan haka, ta koma zuwa hanyar jarida tare da littafin "Dyddiadur Mari Gwyn" ("Mari Gwyn<unk>s Diary") wanda ke magana game da tsananta wa Katolika a zamanin Elizabeth I kuma yana mai da hankali kan marubucin Welsh na Elizabethan Robert Gwyn. Wannan ya biyo bayan Jones marubucin trilogy na litattafai tsakanin 1987 da 1993 waɗanda aka saita a cikin Zamanin Sarakuna: "Cribau Eryri" ("The Ridges of Snowdonia"), "Barrug y Bore" ("Morning Frost") da "Adar Drycin" ("Storm Birds"). An yi wahayi zuwa gare ta don rubuta trilogy bayan da ya kasa
1979 zaben raba gardama na Welsh, da kuma karuwar yawan jama'a a cikin yankunan Welsh. Littafin karshe na Jones "Cydio Mewn Cwilsyn (Taking up a Quill"), wani littafin tarihin 'yar Edmund Prys, an buga shi a shekara ta 2002. Ta rubuta litattafai goma a tsawon rayuwarta kuma ta wallafa tarin waƙoƙin yara na asali.