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See Peter Bartrum, http://cadair.aber.ac.uk/dspace/bitstream/handle/2160/6400/PERROT%2... (August 18, 2017; Anne Brannen, curator)
See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5207/BLEGYWR... (January 21, 2021; Anne Brannen, curator)
Please see Peter Bartrum: Perrot 2; https://www.geni.com/documents/view?doc_id=6000000173426969987 & Blegywryd 3 (B); https://www.geni.com/documents/view?doc_id=6000000173399176832 (Steven Ferry, August 8, 2024.)