Added the below entry and image to the Trombone History Timeline (19th century, first half). Interesting related themes include Females in Trombone History and rear-facing trombones.

1865—Paris, France: A satirical graphic titled Domestic joys of parents whose daughters take part in women’s orchestras, published in Le monde illustré, includes a woman playing a rear-facing trombone (see below image; public domain) (Le monde illustré, 9, no. 442; Sept 30 1865).