Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Wynfield took photographs of all the members in fancy dress, along with other notable associates such as John Everett Millais and Manet. Most of the members also belonged to the Artists Rifles.
Notes
Reynolds, Graham, Victorian Painting, Macmillam, 1966, p. 179.