Manuscripts
Manuscript:
London, British Library, MS Cotton Vitellius A xii
  • s. xiex–xiiex
Not yet published
Walsh, Maura, and Dáibhí Ó Cróinín, Cummian’s letter De controversia Paschali: together with a related Irish computistical tract De ratione conputandi, Studies and Texts, 86, Toronto: Pontifical Institute of Mediaeval Studies, 1988.
CELT – De controversia Paschali, text (pp. 56–96): <link> CELT – De controversia Paschali, translation (pp. 57–95): <link>

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