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See Peter Bartrum, http://cadair.aber.ac.uk/dspace/bitstream/handle/2160/6399/PERROT%2... (August 18, 2017; Anne Brannen, curator)
See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173432575890 (August 31, 2022; Anne Brannen, curator)
Please see Peter Bartrum: Perrot 1; https://www.geni.com/documents/view?doc_id=6000000173426918011 & Wiriot; https://www.geni.com/documents/view?doc_id=6000000173432575890 (Steven Ferry, August 7, 2024.)