1. Aberystwyth, Llyfrgell Genedlaethol Cymru 2013 NLW 20143A and Peniarth 28 www.llgc.org.uk/?id=lawsofhyweldda
2. British Library, London 2013a Lindisfarne Gospels http://www.bl.uk/onlinegallery/sacredtexts/lindisfarne.html
3. British Library, London 2013b Luttrell Psalter www.bl.uk/onlinegallery/ttp/luttrell/accessible/introduction.html