These images were just added to the Trombone History Timeline (20th century). Enjoy!

c. 1905—Harry Payne (1858-1927), an English military artist, includes trombone in a number of military band paintings. The images, depicting the Coldstream Guards, Royal Scots Greys (2^nd Dragoons), Irish Guards, 17^th Lancers, and 1^st Royal Dragoons, are marketed as a series of oilette postcards (see below 5 images; public domain).