Different types of modern trumpets in the Méthode pour la trompette by François-Georges-Auguste Dauverné, including the sliding trumpet, which was the favorite of Saint-Saëns during the 1850's. Paris, G. Brandus, Dufour & Cie, 1856, p. XXV.
Bibliothèque nationale de France, Paris. Département de la Musique, Vm8 L. 93