Lewis, Barry James (2018) Ar drywydd Magna, ‘chwaer Dewi Sant’, ac eglwys ddiflanedig yn Nyffryn Teifi. Studia Celtica, 52. (Accepted Version)
Lewis, Barry James (2016) A New Synthesis of Early Medieval Brittonic History (Wales and the Britons 350–1064 by Thomas M. Charles-Edwards). Celtica, 28. pp. 217-237. ISSN 0069-1399
Lewis, Barry James (2016) Review of Alan Macquarrie, Legends of Scottish Saints. Celtica, 28. pp. 262-266. ISSN 0069-1399
Lewis, Barry James (2018) Review of Lynette Olson (ed.), St Samson of Dol and the Earliest History of Brittany, Cornwall and Wales. Studia Celtica, 52 (1). pp. 188-192. ISSN 0081-6353 (Print); 2058-5098 (Online) (Accepted Version)
Lewis, Barry James (2018) Review: Hayden and Russell, Grammatica, Gramadach and Gramadeg: Vernacular Grammar and Grammarians in Medieval Ireland and Wales. Celtica, 30. pp. 223-229. ISSN 0069-1399
Lewis, Barry James (2014) St Mechyll of Anglesey, St Maughold of Man and St Malo of Brittany. Studia Celtica Fennica, 11. pp. 24-38. ISSN 1795-097X
Lewis, Barry James (2022) Approaching the genealogies of the Welsh saints. In: Seintiau Cymru/Sancti Cambrenses: Astudiaethau ar Seintiau Cymru/Studies in the Saints of Wales. Centre for Advanced Welsh and Celtic Studies, Aberystwyth, pp. 65-100.
Lewis, Barry James (2019) Arthurian references in medieval Welsh poetry, c. 1100-c. 1540. In: Arthur in the Celtic Languages: The Arthurian Legend in Celtic Literatures and Traditions. Arthurian Literature in the Middle Ages (9). University of Wales Press and the Vinaver Trust, Cardiff, pp. 187-202. ISBN 978-1-78683-343-3 (Accepted Version)
Lewis, Barry James Bot in Middle Welsh. [Teaching Resource] (Unpublished)
Lewis, Barry James DIAS SCS Summer School 2022 Middle Welsh Reading passages notes. [Teaching Resource] (Unpublished)
Lewis, Barry James Extra handout kael kaffael. [Teaching Resource] (Unpublished)
Lewis, Barry James Extra handout the three chief irregular verbs. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh langauge notes 2: noun, article and lenition. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh language notes 1: sounds and spelling. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 3: adjectives. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 4 Possession. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 5 sentences. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 6 The Verb. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 7 Pronouns. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 8 Verbal Nouns. [Teaching Resource] (Unpublished)
Lewis, Barry James Middle Welsh teaching notes 9 Negative main clauses and other VSO type clauses. [Teaching Resource] (Unpublished)
Lewis, Barry James Peryf ap Cedifor passage notes. [Teaching Resource] (Unpublished)
Lewis, Barry James Reading passages for DIAS SCS Summer School 2022 Middle Welsh. [Teaching Resource] (Unpublished)
Lewis, Barry James The cat in a monk's habit reading passage. [Teaching Resource] (Unpublished)
Lewis, Barry James The englyn. [Teaching Resource] (Unpublished)
Lewis, Barry James The servant of the chamber notes. [Teaching Resource] (Unpublished)