Opera hactenus inedita Rogeri Baconi

The Opera hactenus inedita Rogeri Baconi was published in 1905 as part of an ambitious scholarly effort to bring the lesser-known philosophical and scientific manuscripts of the thirteenth-century Franciscan friar Roger Bacon to a wider academic audience. Edited by Robert Steele and issued by the Clarendon Press at Oxford, this volume focused specifically on the Metaphysica Fratris Rogerii, reflecting the late Victorian and Edwardian era's growing interest in medieval scholasticism and the intellectual history of natural philosophy.

The publication was designed to provide a critical, rigorous text that reflected the complexity of Bacon's original Latin manuscripts, which had long remained scattered and inaccessible in various European libraries. By producing this series, the Clarendon Press aimed to establish a definitive resource for historians of science, positioning Bacon not merely as a mystic, but as a proto-empirical thinker. The work was well received by the academic community for its meticulous editing, serving as a cornerstone for twentieth-century studies into Bacon's influence on the development of the scientific method.