Byrhtferth’s ‘Diagram of the Physical and Physiological Fours’, Oxford, St John’s College manuscript, no. 17, folio 7 verso. This manuscript is a copy of Byrhtferth’s computus, written in Thorney around AD 1110–1111.

March 10, 2012 By

Byrhtferth’s ‘Diagram of the Physical and Physiological Fours’, Oxford, St John’s College manuscript, no. 17, folio 7 verso. This manuscript is a copy of Byrhtferth’s computus, written in Thorney around AD 1110–1111.

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