Green F with red tail Traités musicaux de Gui d’Arezzo Source: gallica.bnf.fr Bibliothèque nationale de France, Département des manuscrits, Latin 10508, fol. 59v. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.