Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 5, 1398-1404. Originally published by His Majesty's Stationery Office, London, 1904.
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'Papal Chronology', in Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 5, 1398-1404, (London, 1904) pp. ix. British History Online https://www.british-history.ac.uk/cal-papal-registers/brit-ie/vol5/ix [accessed 19 April 2024]