Du Vignau, better known for his ‘Le Secretaire Turc: contenant l'art d'exprimer ses pensées sans se voir, sans se parler et sans s'écrire’ printed in 1688, was for some time the secretary to the French embassy to the Sublime Porte. Published in the aftermath of the unsuccessful siege of Vienna by the Ottomans in 1683 and the following withdrawal, it deals with the factors related to the decline of the Ottoman Empire and aims to present an overview of the Ottoman power. A second edition was printed in The Hague in 1688, and an English translation appeared that same year. The provenance of this book is particularly interesting because it passed through the hands of two nineteenth-century oriental scholars, Louis Langlès and Charles Schefer. There is a note dated November 1899 on the title page, perhaps in the hand of Schefer (?).