I just added the 2 drawings and captions below to the Trombone History Timeline (19th century, 1826-1850). I also added them to Serpent & Ophicleide Images: 1600-1850.

1849—London, England: A drawing in the British weekly magazine, Punch, includes a band with trombone, ophicleide, bass drum, and cymbals. The article attached to the image, titled A Prospect of Greenwich Fair, mentions “half-a-dozen different Bands playing as many Tunes” (May 29, 1849; see above image; public domain).

1849—London, England: A drawing in the British weekly magazine, Punch, accompanying an article titled “Kensyngton Gardens with ye Bande Playinge There,” includes trombone and ophicleide among the band. The article says, “The Tunes played mostly Polkas and Waltzes, though now and then a Piece of Musique of a better sort; but the Musique little more than an Excuse for a Number of People assembling to see and be seen (June 1, 1849; see above image; public domain).