Added this image and caption to the Trombone History Timeline (19th century, 1826-1850). You can also find it in the Serpent & Ophicleide iconography pages.
1848—London, England: A cartoon published in Punch magazine includes an aggressive trombonist among members of a band marching in the street (see below image, click to expand; public domain) (vol. XIV, p. 236).