Two engraved pages published by Imbault, complete as is. The instrument is depicted on the first page which is entitled: Gamme du Serpent / Pour apprendre à jouer sans Maître (Scale of the Serpent / To teach someone without a teacher). It contains all the elementaries including fingering and how to produce notes with the tongue and breathing. The second page includes three lessons and two pieces.
Serpent methods are quite rare.GPH-14191$400