Just added the below caption and image to the post, Serpent & Ophicleide: History and Images.

1812—Paris, France: Carle Vernet, a leading French military artist, is commissioned to provide paintings of Napoleon’s new military uniforms for use by the military and its tailors. Among the series of paintings, assembled in the collection Le Grande Armée de 1812, is a picture of military musicians that includes a serpent hanging on a wall in the background (see below image; public domain) (source: wikimedia).