The image and caption below were just added to the Trombone History Timeline (19c, 2nd half). I also added them to the post, Trombone and the Dance, which includes details about the association of trombone with dance throughout the instrument’s history.

1873—France: L’Alsace d’autrefois, an engraving from Le Monde Illustré, depicts a trio of musicians, including trombone, playing for a dance in old Alsace, France.