Original research in the visual arts
'The Gothic Revival Character of Ecclesiastical Stained Glass in Britain', Folia Historiae Artium, new series, 17, 25–42.
‘A Change in Direction: Modernism in the Stained Glass of the Diocese of Llandaff in the 1950s and 1960s’, The Journal of Stained Glass, vol. 42, 2018, 54–68.
Review of Jasmine Allen, Windows for the World: Nineteenth-century stained glass and the international exhibitions, 1851–1900 (Manchester University Press, 2018) in Vidimus, issue 127, June 2019.
Review of Georgina Maltby and Andrew Loutit, Theodora Salusbury: Stained Glass Artist 1875–1956 (Privately Printed, 2018) in The Journal of Religious History, Literature and Culture, vol. 5, no. 1, 114–6.
Stained Glass at the Church of St Peter, Carmarthen (Sulien Books, 2018), 28 pp + iv.
(with John Hammond) Stained Glass at the Church of St Peter, Lampeter (Sulien Books, 2017), 28 pp + iv.
‘Artists and Workshops in the Sixteenth-Century Low Countries: Further Thoughts on the Neave Glass at Llanwenllwyfo’, Vidimus, Feature for issue 104, November 2016.
'Neave Glass at Llanwenllwyfo: dating and attribution', in J.O. Hughes, Catherine Hughes & Avril Lloyd, Trysorau Cudd: Gwydr Lliw yn Santes Gwenllwyfo, Dulas, Môn / Hidden Gems: Stained Glass at the Church of St Gwenllwyfo, Anglesey (Sulien Books, 2016), pp. 14–27.
‘Remnants of a Glittering Treasure: Thomas Johnes’s Stained Glass at Hafod’, Vidimus, Feature for issue 100, June 2016.
Stained Glass at Hafod (Sulien Books, 2016), 18 pp + vi.
'Medieval Stained Glass in North Wales and its Treatment in the 19th Century', Historic Churches, vol. 23, Summer 2016, 31–3.
The Medieval Tiles of Strata Florida (Sulien Books, 2014),
Stained Glass from the Church of St Mary the Virgin, Tenby (Sulien Books, 2014), 24 pp.
The Medieval Grostesques of Gresford (Sulien Books, 2014), 20 pp.
Stained Glass from Welsh Churches (Y Lolfa, 2014), 348 pp + vi.
‘Belgian Glass in a Corner of Britain’, Vidimus, Feature for issue 79, April 2014.
Ffenestri Lliw yn Llanfihangel Genau'r Glyn (Wendall Publications, 2013), 26 pp + ii.
Stained Glass Windows in Llanfihangel Genau'r Glyn Church (Wendall Publications, 2013), 26 pp + ii.
‘Stained Glass in Welsh Chapels’, Bulletin of the Wesley Historical Society in Wales, no. 2, 2012, 131–2.
'Stained Glass in Wales', Vidimus, Feature for Issue 57, February 2012.
Stained Glass in Wales Database (2011 and ongoing).
'New Light on Old Stone: Recording and Reinventing Visual Culture', in Alan Seal, Jonathan Bowen and Kia Ng (eds.), Electronic Visualisation and the Arts: Proceedings of EVA London 2010 (London, July 2010), pp. 339-46.
'Biblical Art from Wales: the Mediaeval Influence' in Martin O'Kane & John Morgan-Guy (eds.), Biblical Art from Wales (Sheffield Phoenix Press, 2010), pp. 121–37.
Imaging the Bible in Wales, DVD-ROM (Sheffield Phoenix Press, 2010).
'Imaging the Bible', The Reader, vol. 105, no. 4, Winter 2008, 22–3.
(with John Morgan-Guy) Imaging the Bible in Wales Database (2008 and ongoing).
'Interpreting Welsh Medieval Narratives: Exploring Parallel Traditions and Historical Process through Contemporary Art', Studi Celtici, vol. III, 2004, 295–324.
‘The Celtic Revival’ section on the CD-ROM Peter Lord, The Visual Culture of Wales: Medieval Vision (Cardiff, 2004), and contributions to other sections in the series.
‘Arthur y Saeson’, Tu Chwith, vol. 15, Summer 2001, 112–14.
‘Get interactive’, Artyfact: The Magazine of the Arts Centre Group, Oct/Dec 1997, 6–7.