Abstract

This article examines the use of Honorius Augustodunensis’s Elucidarium in the Prohemium of a three-part introduction to the astrological sciences, namely the Liber introductorius by Michael Scot. The investigation into the adoption of the Elucidarium in the Prohemium not only reveals the work of Honorius Augustodunensis as a major source of the Prohemium but, more importantly, challenges the recent consensus on the relation between the two versions in which the Liber quatuor distinctionum—the first book of the Liber introductorius—has been transmitted. The present contribution will argue that the Long Version is indeed prior to the Short one. The use of the Elucidarium both by Michael Scot and by Godfrey of Viterbo is explored within the article and highlights the need for further research to clarify whether they shared an intellectual framework, or even drew on a common textual source.