⚠The image is extremely faded, making the text nearly illegible. Transcription is based on visual patterns and confirmed against bibliographic records for this specific edition (Opera hactenus inedita Rogeri Baconi, Fasc. VI).

Works of Roger Bacon hitherto unpublished

Volume VI

THE COMPUTUS Computus: A medieval science focused on calculating time and the dates of the movable feasts in the Christian calendar, primarily Easter, through a combination of mathematics and astronomy. OF BROTHER ROGER

INCLUDING

THE COMPUTUS OF MASTER ROBERT GROSSTESTE original: "Roberti Grossteste"; Grosseteste (c. 1175–1253) was a prominent English statesman, philosopher, and Bishop of Lincoln who influenced Bacon’s scientific outlook.

JOINED WITH THE COMPUTUS OF ALEXANDER

DE VILLA DEI original: "Alexandri de Villa Dei"; Alexander of Villedieu (c. 1175–1240) was a French author and teacher known for his mnemonic verses on grammar and mathematics.

NOW FIRST EDITED BY

ROBERT STEELE

AT OXFORD

FROM THE CLARENDON PRESS

1926